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MH SET 2025: 15 June, Paper II, Chemical Sciences

  • Date: 15 June 2025
  • Paper code: JUN-33225
  • Series: A
  • Language: Bilingual
  • 44 pages
MH SET 2025 question paper, 15 June 2025, Paper II, Chemical Sciences, page 1 of 44
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Test Booklet Code & Serial No.
                                                                                                                      A
                                                    CHEMICAL SCIENCE
Signature and Name of Invigilator                                                         Seat No.
1. (Signature) .........................................                                                    (In figures as in Admit Card)
      (Name) ................................................                     Seat No. ..............................................................
2. (Signature) .........................................                                               (In words)

      (Name) ................................................                 OMR Sheet No.
JUN - 33225                                                                                               (To be filled by the Candidate)
Time Allowed : 2 Hours]                                                                                 [Maximum Marks : 200
Number of Pages in this Booklet : 44                                                     Number of Questions in this Booklet : 100
                      Instructions for the Candidates
1.         Write your Seat No. and OMR Sheet No. in the space provided              1.
           on the top of this page.
2.         This paper consists of 100 objective type questions. Each question
           will carry two marks. All questions of Paper II will be compulsory.      2.
3.         At the commencement of examination, the question booklet
           will be given to the student. In the first 5 minutes, you are
           requested to open the booklet and compulsorily examine it as             3.
           follows :
           (i)      To have access to the Question Booklet, tear off the                    (i)
                    paper seal on the edge of this cover page. Do not accept
                    a booklet without sticker-seal or open booklet.
           (ii)     Tally the number of pages and number of questions in                    (ii)
                    the booklet with the information printed on the cover
                    page. Faulty booklets due to missing pages/questions
                    or questions repeated or not in serial order or any
                    other discrepancy should not be accepted and correct
                    booklet should be obtained from the invigilator within
                    the period of 5 minutes. Afterwards, neither the Question
                    Booklet will be replaced nor any extra time will be                     (iii)
                    given. The same may please be noted.
           (iii)    After this verification is over, the OMR Sheet Number
                    should be entered on this Test Booklet.                         4.                    (A), (B), (C)   (D)
4.         Each question has four alternative responses marked (A), (B),
           (C) and (D). You have to darken the circle as indicated below on
           the correct response against each item.
           Example : where (B) is the correct response.                                             (B)

                        A                  C        D                                                       A               C       D
           Following wrong methods should not be used as they are not                                                                 (Digitized)
           recognised by scanning machine in digitized assessment.
           Candidate using such method will be responsible for their loss.




5.         Your responses to the items are to be indicated in the OMR
           Sheet given inside the Booklet only. If you mark at any place
           other than in the circle in the OMR Sheet, it will not be evaluated.
6.         Read instructions given inside carefully.
7.         Rough Work is to be done at the end of this booklet.
8.         If you write your Name, Seat Number, Phone Number or put
           any mark on any part of the OMR Sheet, except for the space
           allotted for the relevant entries, which may disclose your
           identity, or use abusive language or employ any other unfair
           means, you will render yourself liable to disqualification.
9.         You have to return original OMR Sheet to the invigilator at the
           end of the examination compulsorily and must not carry it with
           you outside the Examination Hall. You are, however, allowed
           to carry the Test Booklet and duplicate copy of OMR Sheet on
           conclusion of examination.
10.        Use only Blue/Black Ball point pen.
11.        Use of any calculator or log table, etc., is prohibited.
12.        There is no negative marking for incorrect answers.
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JUN- 33225/II—A




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JUN- 33225/II—A
                            Chemical Science
                                    Paper II
Time Allowed : 120 Minutes]                          [Maximum Marks : 200
Note : This paper contains Hundred (100) multiple choice questions. Each question
       carrying Two (2) marks. Attempt All questions.


1.   The property measured in derivative thermogravimetric analysis (DTG) is :


     (A) Change in weight                    (B) Rate of change in weight


     (C) Heat evolved                        (D) Change in temperature


2.   The species that contain a vacant dx2 – y2 orbital is :


     (A) [Ni(en)3]2+ (en = NH2CH2CH2NH2) (B) [NiCl4]2–


     (C) [Ni(CN)4]2–                         (D) [Ni(CO)4]


3.   FeCl2 . 4H2O and FeCl3 . 6H2O can be distinguished by 57Fe Mössbauer


     spectroscopy. The INCORRECT statement from the following is :


     (A) Both compounds are high spin


     (B) Quadrupole splitting of FeCl2 . 4H2O is higher than that of FeCl3 . 6H2O


     (C) Both compounds show the same isomer shift


     (D) The isomer shift of FeCl2 . 4H2O is higher than that of FeCl3 . 6H2O

                                         3
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4.   The solutions of (i) [Cr(OH2)6]3+ ions are pale blue-green, but the chromite

     ion (ii) [CrO4]2– is an intense yellow due to :


     (A) d-d transitions in (i) and (ii)


     (B) d-d transition in (i) and charge transfer transition in (ii)


     (C) Charge transfer transition in (i) and d-d transition in (i)


     (D) Charge transfer in (i) and (ii)



5.   The major product of the following reaction in :



                      C (CF )
     (Ph3P)4 Pt   ¾¾¾¾¾
                   2 3 4
                         ®

                  PPh3
                         C(CF3)2                     (CF3)2C          C(CF3)2
           Ph3P    Pt                                           Pt
     (A)                 C(CF3)2               (B)
                                                     (CF3)2C           C(CF3)2
                  PPh3


                                                               PPh3
                        C(CF3)2                      (CF3)2C          C(CF3)2
     (C) (Ph3P)2 Pt                            (D)              Pt
                        C(CF3)2                      (CF3)2C           C(CF3)2
                                                               PPh3


                                           4
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6.   The structures of tetrasulphur tetranitride (a) and tetrathiazyl tetrafluoride

     (b) are given below. The statement that correctly describes the structures is :



                                          F                       F
                      S   N     S              S     N        S
                                 1.63 A                        1.66 A
                      N         N              N              N
                                                                1.54 A
                      S   N     S              S      N       S
                                          F                        F
                          (a)                        (b)



     (A) Both, (a) and (b), show extensive delocalization


     (B) Compound (a) satisfies Hückel rule and is more stable than (b)


     (C) Compound (b) satisfies Hückel rule and is more stable than (a)

     (D) Both are aromatic ring systems


                                                                                3
7.   In an axially symmetric field, the first NQR transition energy for I =       is :
                                                                                2


           – e 2Q q                                 + e2Qq
     (A)                                      (B)
              4                                        4


           + e2Qq                                   – e2Q q
     (C)                                      (D)
              2                                       20

                                          5
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8.   In the 19F NMR spectrum of ClF3, the number of signals and multiplicity at

                           æ 19    1ö
     room temperature are çè F; I = ø÷ :
                                   2

     (A) Two, a doublet and a triplet

     (B) Two, doublets

     (C) Two, a singlet and a doublet

     (D) One, quartet

9.   Between NF3 and NH3 :

     (A) NF3 has a higher bond angle than NH3 due to long N–F bond distance

     (B) NF3 has a higher bond angle than NH3 due to an ionic N-F bond

     (C) NF3 has a higher bond angle than NH3 because NH3 is less basic than NF3

     (D) NH3 has a higher bond angle than NF3 because NF3 is less basic than NH3

10. Identify (X) and (Y) in the following transformation


                           Sn(n – Bu)2 LDA (X) CH2Cl2 /MeLi (Y)


     (A) X =            Sn(n – Bu)2 Y =        Sn(n – Bu)2


     (B) X =            Sn(n – Bu)2 Y =        Sn(n – Bu)2


     (C) X =         Sn = CH2 Y =             Sn = CH2



     (D) X =              Sn(n – Bu)2 Y =         Sn


                                          6
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11. The oxyacids of sulphur having direct S-S bonds are :



    (A) H2S2O3, H2S2O4, H2S2O7               (B) H2S2O3, H2S2O4, H2S2O6



    (C) H2S2O6, H2S2O7, H2S2O8               (D) H2S2O4, H2S2O6, H2S2O8

12. The point group of Cis – [PtCl2(NH3)2] is :

    (A) C 2 h                                (B) C 2 v

    (C) D2h                                  (D) Td

13. Covalent multinuclear bonds are found in the solid state structures of :

    (A) MeLi                                 (B) HgMe2

    (C) WMe 6                                (D) PbMe4

14. Alkali metals form strong complexes with cryptate ligands. The structure of

    one such crypt given below is of :




    (A) 4.2.2 crypt                          (B) 6.2.2 crypt

    (C) 2.2.2 crypt                          (D) 8.6.2 crypt

                                         7
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15. Iron-enterobactin [Fe (ent)]3– complex has a dissociation content of 10–49 at

     pH = 7. Calculate the number of uncomplexed Fe3+ ions in a litre of 1 M solution

     in water at pH = 7.

     (A) 1049                                        (B) Less than 1

     (C) 10                                          (D) 10 7

16. Analysis of four different samples of an alloy yielded 12.12, 12.14, 12.10 and

     12.22% of metal. The mean deviation of the result is :

     (A) –0.0750                                     (B) 0.0375

     (C) 0.1500                                      (D) 0.0255

17. The set containing all linear polyhalogen compounds is :

     (A) I3– , Cl3– , BrCl2–                         (B) ICl2– , I3+ , Cl3+

     (C) I3+ , Cl3+ , BrCl2–                         (D) Cl3– , BrCl2+ , ICl2–

18. The radionuclide 229Th belongs to the :

     (A) Thorium decay series                        (B) Uranium decay series

     (C) Actinium decay series                       (D) Neptunium decay series

19. A par t icu lar m et al com plex h as an elect r on ic con figu r at i on of np1 nf1. The number

     of microstates possible in an isolated gaseous state for this metal complex

     is :

     (A) 14                                          (B) 6

     (C) 20                                          (D) 84

                                                 8
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20. If valence shell electron configuration of vanadium is 3d34s2 and that of uranium

    is 5f36d17s2, then both [vo2]+ and (uo2)2+ will have :

    (A) Same number of d-electrons and bent shape for both

    (B) Same number of d-electrons with bent shape for [vo2]+ and linear shape

         for [uo2]2+

    (C) Same number of d-electrons and linear shape for both

    (D) Different oxidation states with linear shape for both

21. For the reaction with [Cr(OH2)6]2+, the inner-sphere redox reaction proceeds

    the fastest for :

    (A) [Co(NH3)6]3+                         (B) [CoF(NH3)5]2+

    (C) [Co(NCS)(NH3)5]2+                    (D) [CoI(NH3)5]2+


22. The polypyrrole ring present in vitamin B12 is :


    (A) Porphyrin                            (B) Chlorin


    (C) Protoporphyrin                       (D) Corrin


23. The spin only magnetic moment of [Co(NH3)6]Cl3 is :


    (A) Zero B.M.                            (B) 4.90 B.M.


    (C) 5.48 B.M.                            (D) 1.73 B.M.

                                         9
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24. K u r n ak ov t est addi t i on of t h i ou r ea (T h ) t o ci s-Pl at i n y i el ds [Pt (T h ) 4]Cl2. In a
      similar process, trans-Platin will react with thiourea to yield : In

      (A) Cis-Pt (Th)2Cl2                                  (B) Trans-Pt (Th)2Cl2

      (C) Trans-[Pt(NH3)2(Th)2]Cl2                         (D) Cis-[Pt(NH3)2(Th)2]Cl2

25. The t2g orbital is filled and has a bonding character in an octahedral environment
      of :

      (A) [TiF6]2–

      (B) [Co(NH3)6]3+

      (C) [Zn(en)3]2+ (en = NH2 . CH2CH2 NH2)

      (D) Cr(CO)6

26. A radical containing two equivalent protons shows a three-line EPR spectrum
      with an intensity of 1 : 2 : 1. The spectral lines are observed at 3302 G,
      3325 G and 3348 G. The hyperfine coupling constant of the proton is :

      (A) 25 G                                             (B) 48 G

      (C) 23 G                                             (D) 63 G

27. The metal ions that are commonly present at the active site of hydrolytic
      enzymes is :

      (A) Zn2+, Mg2+, Ca2+                                 (B) Zn2+, Cu2+, Co2+

      (C) Co2+, Fe2+, Mn2+                                 (D) Mn2+, Ni2+, Mg2+

28. The effective magnetic moment (µeff) of the [Ti(H2O)6]2+ species is :

      (A) 0                                                (B) 2.83 BM

      (C) 3.42 BM                                          (D) 3.92 BM
                                                     10
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29. Correct statement regarding the electronic transitions of f-block elements is :
    (A) f-f transition bands are broad
    (B) There is large d-f orbital mixing
    (C) The transitions are Laporte allowed
    (D) There is a little coupling of electronic transitions with molecular vibrations
30. Semiconductors are class of crystalline solids that show electrical conductivity
    between conductors and insulators. The correct set of semiconductors from the
    pictorial representations Cat zero K and room temperature given below is :




    (A) P = intrinsic semiconductor; Q = p-type semiconductor; R = n-type
        semiconductor
    (B) P = p-type semiconductor; Q = intrinsic semiconductor; R = n-type
        semiconductor
    (C) P = n-type semiconductor; Q = p-type semiconductor; R = intrinsic
        semiconductor
    (D) P = intrinsic semiconductor; Q = n-type semiconductor; R = p-type
        semiconductor
                                         11
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31. The number of signals exhibited by fluoroacetone in 1H-NMR spectrum is :
    (A) Two doublets                      (B) Two singlets
    (C) One doublet and one singlet       (D) One doublet and one triplet
32. Complete the following reaction by suggesting the appropriate substrates
    (I & II) :
            O
                                                           O
 H2N                                     DCC
               OH Protection I & II     HOBt      BOCN       N          OMe
                                                      H      H
                                                                    O


                                    H2N          OH
                                            O
                       O
                                                 O
          BOCN
                                    H2N
             H                 OH
    (A)                                                OMe
                   I
                                            II


        BOCN                   OH     H2N              OMe
    (B)    H
                                                 O
                           O
               I                                 II
                                                 O
    (C) BOCN                   OH   H2N
           H                                           OMe
                           O
           I                                      II


                               OH     H2N                    OMe
        BOCN
    (D)    H
                           O                           O
                   I                             II
                                          12
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33. Suggest most suitable conditions for the following selective conversion :



                   O                                           O


                        O        Ph                                 O           Ph


                   CN                                          CN



    (A) H2, Pd–C (Catalyst)                 (B) H2, RhCl [PPh3]3 (Catalyst)



    (C) H2, PtO2 (Catalyst)                 (D) H2, Raney Ni


34. What major product is isolated from the following reaction :


                              +
                               NMe3




    (A)                                     (B)




    (C)                                     (D)


                                       13
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35. Predict stereochemical outcome of the following reaction :

                              O       O

                                  N       O     nBuLi, –75ºC
                                               ClCH2CH = CH2




    (A) The new stereogenic center formed will have ‘S’ configuration

    (B) The new stereogenic center formed will have ‘R’ configuration

    (C) Both the diastereomers formed are in equal amount

    (D) The product formed will have no new chiral center

36. The major product of the following reaction is :


                                      COOH            I2, AcOH
                                                         D
                           Me
                                                         I
            I

                      O
                                                                 O
                          O                                           O
    (A)                                         (B)

                                                             CH3
                 CH3
            I                                            I
                      O
                                                                 O
                          O
    (C)                                         (D)                   O

                CH3



                                          14
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37. Predict the major product of the following reaction :


                                       NH2
                                                 HONO



                                                           OH
                   OH
    (A)                                         (B)



                                                           O

    (C)                                         (D)
          HO



38. The major product of the following reaction is :


                                          CH3

                                                      H2
                                                                ?
                           H3C        N               Pd/c
                                  O


                          CH3                                               CH3


    (A)                                         (B)
          H3C         N                               H3C               N
                  O                                                 O


                          CH3                                       CH3

                                                                          NH2
    (C)                                         (D)
          H3C         N
                  O                                   H3C           O


                                      15
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41. The major product formed in the following reaction is :


                                   Br (i) NaNH2/Liq. NH3

                                           (ii) Furan
                    H3C



                          O                                   O
    (A)                                     (B)
          H3C                                     H3C



                          O                                       O
    (C)                                     (D)
          H3C                                     H3C


42. The major product of the following reaction is :



                                      (i) I2, AgOAc/AcOH
                                     (ii) KOH, Water


                OH                                      OH
          HO                                      HO
    (A)                                     (B)



                OH                                      OH
          HO                                      HO
    (C)                                     (D)



                                      17
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43. Predict the major product of the following reactions based on HSAB
    principle :

                       1. MeMgBr                        O        1. PhCH2SH
                          THF                                       KOH, THF
                   I         +                                         +
                                                                               II
                       2. H3O                               O    2. H3O


    (A) I = HO                                 Me


                                   O
         II = Ph               S                                  OH


                                           O
    (B) I = HO                                 OH

                                                Me
                                    Me
         II = PhR          S                                     OH


                                    O                   O


    (C) I = Me                                 OH

         II = PhR          S                                OH


                                                    O
              HO                               Me
    (D) I =

                                   O
                                   OH


         II = Ph           S                                     OH
                                       S

                               Ph
                                                    18
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44. Predict the major product of the following reaction :




                                   CL

                                                     NaN3
                                                DMF, 20ºC
                        S
                                        CL




                         N3
                                                      N3



    (A) S                                    (B) S
                              N3

                                                            N3




                    N3
                                                     N3


    (C) S                                    (D) S
                                                                  N3
                   N3


                                        19
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45. The structure of major product in the following reaction is :




                                     Br                   NaOEt
                                                           EtOH


                               Br     O




    (A)                                             (B)
                     COOEt
                                                                  COOEt




    (C)                                             (D)
                     COOEt                                         O

46. The correct order for stretching frequency of carbonyl group of the following
    molecules is :

            O                             O                                 O

                                                                                  O CH3
     CH3        O — CH       CH2    CH3                      CH2       CH

            I                                  II                           III



    (A) II > I > III                                (B) I > II > III

    (C) III > I > II                                (D) I > III > II

                                          20
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47. The 19F-NMR spectrum of CF2Br — CBr2CN at – 98°C shows :

    (A) Two doublets

    (B) Two singlets

    (C) Two doublets and a singlet

    (D) Two singlets and one doublet

48. The correct sequence of pericyclic reactions to achieve the given multistep
    conversion is :
                                                      Ph
                                  Ph                       H


                                                                            H
                                                  H        H        H
                                                                                 CO2H
                            CO2Me
                                                                    H

    (A) (i) Disrotatory 8pe– electrocyclization, (ii) conrotatory 6pe– electrocyclization,

         (iii) Intramolecular p4s + p2s cycloaddition.

    (B) (i) Conrotatory 8pe electrocyclization, (ii) disrotatory 6pe electrocyclization,

         (iii) Intramolecular p4s + p2s cycloaddition.

    (C) (i) Disrotatory 8pe electrocyclization, (ii) Intramolecular p4s + p2s

         cycloaddition, (iii) Conrotatory 6p e electrocyclization

    (D) (i) Conrotatory 8pe electrocyclization, (ii) Intramolecular p4s + p2s

         cycloaddition, (iii) Disrotatory 6pe electrocyclization

                                          21
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49. The major product of the following reaction is :



                       O


                                                   hn




    (A) O                                  (B) O




    (C) O                                  (D)


                                                   O



50. Suggest most appropriate reagent/conditions for the following conversion :




                                  O
                 COOH                               COOH


    (A) m-CPBA; CH2Cl2                     (B) DMDO; CH2Cl2


    (C) CF3COOOH; ACOH                     (D) H2O2; NaOH

                                      22
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53. Which one of the following carbocations is the most stable ?




    (A)                                      (B)                +
                        +




                                                                            +
    (C)                                      (D)
                            +




54. The correct order of the acidity between pairs of compounds given below is :




                                                   O        O       O               O
    O         O                 O       O
                                                                        O       O
                      MeO                    OMe

          P                         Q                  R                    S




    (A) Q > P and R > S                      (B) P > Q and R > S



    (C) P > Q and S > R                      (D) Q > P and S > R


                                        24
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55. Predict which one of the following compounds is antiaromatic ?




    (A)                                     (B)




    (C)                                     (D)




56. Which of the following dienes is least suitable for Diels-Alder reaction with
    maleic anhydride ?




    (A)                                     (B)




    (C)                                     (D)




                                       25
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59. Assign the chiral descriptors for the following molecule :


                         Br                        C6 D 5
                                                   C6H5
                        Ph                     CO2Et


    (A) S, E                                (B) R, E


    (C) S, Z                                (D) R, Z


60. Absolute configuration of the chiral centres (C–2, C–4) and prochirality
    descriptors (HA and HB) in the following compound is :



                                       COOH

                                 H    2       OH

                               HA     3      HB
                                      4
                                 H            OH

                                       COOH


    (A) 2R, 4S; HA : Pro-s; HB : Pro-r


    (B) 2R, 4R; HA : Pro-s; HB : Pro-r


    (C) 2S, 4S; HA : Pro-r; HB : Pro-s


    (D) 2S, 4R; HA : Pro-s; HB : Pro-r

                                       27
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61. In the enzymolysis, the following graph represent Lineweaver-Burk plots for :




    (A) Uncompetative inhibition            (B) Competative inhibition




    (C) Non-competative inhibition          (D) Without any inhibition


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62. For the first order consecutive reaction :


                               K1
                            A ¾¾¾      K2
                                  ® B ¾¾¾ ® C


    Which of the following statement is incorrect ?



    (A) [A] decreases exponential with time



    (B) [C] increases with inverse exponential function with time



    (C) [B] is always greater than [C]



    (D) The tmax depends on K1 and K2



63. A given reaction is fitted into the following Arrhenius form :

                                 é 104.4 (kJ.mol –1 ) ù
    K2   = 6.0 × 1014 (S–1). exp ê–       RT
                                                      ú
                                 ë                    û


    Value of the rate constant at very high temperature would be :



    (A) 3.0 × 104 S–1                        (B) 5.8 × 1014 S–1



    (C) 18.0 × 1010 S–1                      (D) 9.0 × 104 S–1

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64. Enzymolysis with the following mechanism :

                                          k
                                    ¾¾¾
                                      1
                              E + S ¬¾¾ ® ES
                                        ¾ k –1

                                  k2
                              ES ¾¾® E + P

                                 E + I ƒ EI

                         ... (I º inhibitor) I < I < I
                                              1   2    3

    The following behaviors are noted :




    Orders of the reaction, at point ‘A’ and point ‘B’ marked on the graph would
    be :

    (A) One and two                           (B) Two and zero

    (C) Zero and one                          (D) One and zero


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65. The following half cell represents, normal hydrogen electrode (NHE) :

    (A) Pt|H+ (a = 1)|H2(g) (1 atm)

    (B) Pt|H+ (1M H2SO4)|H2(g) (1 atm)

    (C) Pt|H+ (1M HCl)|H2(g) (1 atm)

    (D) Pt|H+ (1M H3PO4)|H2(g) (1 atm))

66. If, we discharge the electrochemical cell rapidly, then :

    (A) Maximum enthalpy is converted to useful work

    (B) Small amount of entropy is generated

    (C) Cell is expected to deliver maximum energy density

    (D) The cell will give out maximum entropy

67. Eº value for various ions are as follows :

                              Eº(Mn O4– ) = +1.51 V

                            E°(Ag/Ag+) = +0.7996 V

                             Eº(Au/Au+) = +1.692 V

                             Eº(Zn/Zn2+) = –0.761 V

    Based on this data, permaganate can be used to oxidize :

    (A) Au, Ag, Zn                          (B) Au, Ag

    (C) Zn, Ag                              (D) Zn, Au

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68. The position and momentum operators do not commute because :


                       h dY        n     h æ        dY ö
          x Px Y = x * i dx and Px x Y = i çè Y + x dx ø÷
          n
    (A)


                   h æ       dY ö        n     xh dY
    (B)
          n
          x Px Y =   ç Y + x    ÷ and Px x Y =
                   i è       dx ø               i dx


          n                  xh dY
    (C)   x Px Y = Px xY =    i dx


          n        h dY
    (D)   x Px Y = i dx


69. A ratio of relative probability of finding an electron in hydrogen atom in the
    volume region 1.0 pm3 at r = a0 w.r.t. the probability r = 0 (nucleus) is :

    (A) 5.1                                  (B) 6.0

    (C) 7.1                                  (D) 1.0

70. For the particle in 1-D box, the value of quantum number n = 0 is ruled out
    because :

    (A) The energy of the particle becomes diverging at n = 0

    (B) The wave function becomes divergent at n = 0

    (C) Particle starts following classical mechanics principle

    (D) It implies Y = 0, everywhere in the box


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71. A crystal is spatial periodic arrangement of large number of atom/ions. When

    size of crystal is reduced to nano-meter range the diffraction peaks :


    (A) Sharpen                               (B) Broaden


    (C) No change in HWFM                     (D) Splits


72. Vapour pressure of 0.5 molal solution of non-volatile solute in organic solvent

    at 30ºC would be :


    (Given : vapour pressure of pure organic solvent is 100 torr; the molecular weight

    of organic solvent is 100 g mol–1).


    (A) 125.50 torr                           (B) 90.25 torr


    (C) 100.25 torr                           (D) 119.95 torr


73. Molar conductance of 0.01 M acetic acid was found to be 16 × 10–4 S m2 mol–1

    at 30ºC. Molar conductance of H+ and CH3COO– ions at infinite dilution are

    350 × 10–4 S m2 mol–1 and 50 × 10–4 S m2 mol–1, respectively at same

    temperature. What percentage of acetic acid is dissociated at that concentration ?


    (A) 0.040                                 (B) 0.055


    (C) 0.072                                 (D) 0.080

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74. The following XRD is recorded for the crystalline solid, having simple cubic
    crystal structure :




    If this crystal would have been FCC, the following peaks would have
    missing :


    (A) A, B, C, F, G H                    (B) B D, F H A


    (C) A B E F H                          (D) F G H C D


75. The variation of Cp with pressure at constant temperature is given by :


             æ ¶2 V ö                              æ ¶2S ö
    (A)   –T ç 2÷                          (B)   T ç 2÷
             è ¶T ø P                              è ¶T ø P



            æ ¶S ö                                 æ ¶2P ö
    (C)    Tç ÷                            (D)   T ç 2÷
            è ¶T ø P                               è ¶T ø V

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76. Consider the reaction :

                        3
            H2S(g) +      O2(g) ƒ SO2(g) + H2O(g), DHº = 518.62 kJ
                        2

    What is the effect of increase of temperature and pressure on the reaction ?

    (A) Retardation and advancement of reaction, respectively

    (B) Retardation of reaction in both cases

    (C) Advancement of reaction in both cases

    (D) No effect of increase in pressure and retardation due to increased

          temperature

77. According to the phase diagram given below, the composition of the layer ‘a’

    relative to the layer ‘b’ at point ‘c’ is :




          ac                                        bc
    (A)                                       (B)
          bc                                        ac
          ac                                        bc
    (C)                                       (D)
          ab                                        ab

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78. The number of microstates of distributing five quanta of energy among four


    distinguishable particles is :


    (A) 56                                  (B) 14


    (C) 35                                  (D) 126



79. In terms of partition function, the free energy is given by :



    (A) –NkT ln q + PV



    (B) –NkT ln q


                d
    (C) –NkT       ln q
                dt


    (D) NkT2 ln q + PV



80. The pH of the mixture of 800 ml of 0.1 M HCl and 200 ml of 0.3 M NaOH


    is close to :



    (A) 1.10                                (B) 6.90



    (C) 13.3                                (D) 1.70

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81. The spectra shown below is due to :




    (A) Perpendicular vibrations in a linear polyatomic molecule

    (B) Vibrational-rotational transitions in a diatomic molecule

    (C) Effect of nuclear spin homonuclear diatomic molecule

    (D) Breakdown of Born-Oppenheimer approximation


82. For a molecule to be Raman active :


    (A) Dipole moment of molecule must change during molecular transitions


    (B) It must have polarizability


    (C) Molecular motion must cause some change in molecular polarizability


    (D) It must have non-zero dipole moment

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83. ‘Provided the moment of inertia of a diatomic molecule is 1.40 × 10 –46 kg. m2,

    what can be stated about the population in first excited rotational level at

    25ºC ?

    (Given : kT = 4.1 × 10–21 J)

    (A) All the molecules are in ground energy level

    (B) All the molecules are in excited energy level

    (C) Equal population in ground and excited level

    (D) Slightly high population in ground level compared to excited level

84. A compound shows a peak at 240 Hz down field relative to reference peak on

    N M R i n st r u m en t w or k i n g at 60 M H z. W h at i s t h e ch em i cal sh i ft ( t) of the

    compound ?

    (A) 6 ppm                                        (B) 7 ppm

    (C) 3 ppm                                        (D) 4 ppm

85. For a free radical containing two equivalent protons, lines occur at 330.2 mT,

    332.5 mT and 334.8 mT. What is the hyperline coupling constant for each

    proton ?

    (A) 4.6 mT                                       (B) 2.3 mT

    (C) 2.3 T                                        (D) –4.6 mT

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86. In which state Be3+ will have same orbital radius as that of ground state of


    hydrogen atom ?



    (A) n = 1                               (B) n = 0



    (C) n = 2                               (D) n = 3


87. The term representing electron-nucleus interaction in Hamiltonian operator for


    many electron atom is proportional to :

            e2                                          Ze2
    (A)   år                                (B)   –å
          i ij                                        i ri

            Ze                                        Ze 2
    (C)   år                                (D)   –
                                                       rij
          i  i



88. The secular determinant for a heteronuclear diatomic molecule is :


    (A) ( aA – E) (aB – E) – b2 = 0


    (B) (a– E)2 – (b – ES)2 = 0


    (C) (a – E)2 – b2 = 0


    (D) (aA – E) (aB – E) – (b – ES)2 = 0

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89. The significance of weight average (Mw) and number average (Mn) molecular

    weights is that :

    (A)   Mw is sensitive to low molecular weight species

    (B) Mn is sensitive to high molecular weight species

    (C)   Mw is sensitive to high molecular weight and Mn is sensitive to low
          molecular weight

    (D)   Mn / Mw gives information of polydispersivity

                                                                          V
90. If the fraction of surface sites occupied by an adsorbate is given by V , the
                                                                           m
    equation for adsorption isotherm is :

           1   1   1                              V   1   1
    (A)      =   +                          (B)     =   +
          Vm PbVm V                               Vm Vm Pb


          1   1   1                                V      1
    (C)     =   +                           (D)      =1+
          V PbVm Vm                               Vm     PbV

91. Sharp absorbance in case of silver and gold nanoparticles observed in UV-vis
    spectroscopy is attributed to :

    (A) Lattice phonon vibrations

    (B) Oscillation of free electrons on metal surface

    (C) Size quantization effect

    (D) Interaction among nanoparticles

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92. Major source of post-industrial CO2 emission other than vehicular emission is/

    are from :

    (A) Paper industry                      (B) Textile industry

    (C) Cement and steel industry           (D) Pharmaceutical industry

93. For a butadiene molecule, the energy values of levels obtained by using HMO

    theory are :

    (1)   a – 1.6 b

    (2)   a + 1.6 b

    (3)   a + 0.6 b

    (4)   a – 0.6 b

    What is the sequence of levels in the order of increasing energy ?

    (A) (1), (2), (3), (4)                  (B) (3), (2), (4), (1)

    (C) (2), (3), (4), (1)                  (D) (4), (3), (1), (2)

94. The total multiplicity of the R-S term 5I4 is :

    (A) 65                                  (B) 13

    (C) 9                                   (D) 18

95. [NO2]+ has a shape similar to :

    (A) SO2                                 (B) SiO2

    (C) H2O                                 (D) O3

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96. The number of significant figures to the answer of subtraction (64.6312 – 64.5899)

    is :

    (A) 4                                     (B) 6

    (C) 3                                     (D) 2
                                                                          æ   1ö
97. Hyperfine lines expected in the EPR spectrum of tetranuclear rhodium çèI = ø÷
                                                                              2
    complex :

    (A) 5                                     (B) 2

    (C) 4                                     (D) 3

98. Catalytic converters are used for reduction and oxidation reactions to reduce

    harmful emissions. The reduction of nitrogen oxides uses the following metal

    based catalyst :

    (A) Pt; Rh                                (B) Ni; Pt

    (C) Fe; Pd                                (D) Co; Ni

99. Ketoconazole is commonly used as :

    (A) Antibacterial                         (B) Antitubercular

    (C) Antifungal                            (D) Antimalarial

100. Which of the following molecule is a prodrug ?

    (A) Vancomycin                            (B) Aspirin

    (C) Amphotericin B                        (D) Pencillin G

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Source: Savitribai Phule Pune University. Question paper published by Savitribai Phule Pune University.