TS SET 2012: Paper III, Chemical Sciences
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Test Paper : III Test Booklet Serial No. : ______________________
OMR Sheet No. : ________________________________
Test Subject : CHEMICAL SCIENCES
Hall Ticket No.
Test Subject Code : A-02-03
(Figures as per admission card)
Name & Signature of Invigilator
Name : ____________________________________ Signature : ___________________________________
Paper : III
Subject : CHEMICAL SCIENCES
Time : 2 Hours 30 Minutes Maximum Marks : 150
Number of Pages in this Booklet : 16 Number of Questions in this Booklet : 75
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IIIG 1 A-02-03
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*A0203* IIIG 2 A-02-03
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*A0203*
CHEMICAL SCIENCES
Paper – III
1. The bond order and the number of 5. The high resolution 1H NMR spectrum of
unpaired electrons in O2− are respectively CHCl2 – CH2 Br exhibits
I. 1.0 (A) Two doublets
II. 1.5 (B) Two triplets
III. 0 (C) One triplet and one doublet
IV. 1
(D) One singlet and one doublet
(A) I, III
6. Assertion (A) : The chemical potential
(B) I, IV
of ith component in a
(C) II, III
mixture depends on
(D) II, IV
the composition of the
2. Among the following, the species which mixture.
contains a multiple metal-metal bond is
Reason (R) : The molecular forces
(A) Fe3(CO)12 depend on the
(B) Fe3O4 molecular environment.
(C) Cr2 (CH3COO)4 (A) A is false, R is true
(D) Mn2(CO)10
(B) A is true, R is false
3. Paraldehyde is formed from (C) A and R are true but R is not the
(A) Methanol correct explanation of A
(B) Propanol (D) A and R are true, and R is the correct
(C) Benzaldehyde explanation of A
(D) Ethanal
7. Which of the following represents correct
4. Periodate oxidation of sucrose gives order of ligands in terms of their strength ?
–
(A) One mole of HCO2H (A) CO > en > Cl > H2O
(B) One mole of HCHO (B) CO > Cl– > en > H2O
(C) Two moles of HCO2H (C) CO > en > H2O > Cl–
(D) Two moles of HCHO (D) CO > H2O > en > Cl–
IIIG 3 A-02-03
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*A0203*
8. The success of flame emission 11. Match the following
List – I List – II
spectroscopy as an analytical technique
I. Phosphorescence 1. a schematic
depends on diagram of the
various type of
(A) Ionization of sample
non-radiative
(B) Polymerization of sample and radiative
transitions that
(C) Solvation of sample can occur in
molecules
(D) Atomization of sample
II. Intersystem 2. Spontaneous
crossing emission of
9. The reaction of 2-chloropyridine with
radiation arising
sodium ethoxide is from a transition
between states
(A) Elimination followed by addition of different
multiplicities
(B) Electrophilic aromatic substitution
III. Fluorescence 3. Spontaneous
(C) Addition followed by substitution emission of
radiation
(D) Nucleophilic aromatic substitution arising from
transition
10. Aspartic acid at pH 10 exists as between states
of the same
(A) H2N − C H − COO − multiplicity
| IV. Jablonski 4. Non-radiative
CH2 − COO − diagram transition
between states
+ of different
(B) H3 N− CH − CO 2H
multiplicity
|
CH2 − CO 2H 5. Non radiative
transition
+ between states
(C) H3 N− CH − COO − of the same
| multiplicity
CH2 − COO − I II III IV
(A) 1 2 3 5
+
(D) H 3 N− CH − COO − (B) 3 1 2 5
| (C) 2 4 3 1
CH 2 CO 2H (D) 2 5 3 1
IIIG 4 A-02-03
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*A0203*
12. An ESR spectrum of hydrogen atom 14. Mention the principle involved in LED-
shows two lines. This is due to television
(A) Spin-spin coupling (A) Luminescence
(B) Quadrupole coupling (B) Phosphorescence
(C) Hyperfine coupling (C) Electroluminescence
(D) Antiferromagnetic coupling (D) Fluorescence
13. In the following sequence of reactions 15. In the transformation of oxyhemoglobin to
deoxyhemoglobin
2+
CO2H
(A) Low spin Fe changes to high spin
i) CH2N2
⎯⎯ ⎯ ⎯ ⎯⎯→ [ X] Fe2+
ii) 2PhMgBr (B) Low spin Fe2+ changes to low spin
iii) CrO3 Fe
3+
(C) High spin Fe2+ changes to low spin
2+
the major product [X] is Fe
(D) High spin Fe2+ changes to high spin
CO2H
Fe3+
16. The correct statements among the
following :
(A)
1. The canonical ensemble is an
imaginary collection of replications of
the actual system with a common
CO2H
temperature.
2. The Boltzmann distribution gives the
number of the molecules in each state
(B) of a system at any temperature.
3. The partition function is an indication
of the number of thermally accessible
states at the temperature of interest.
CO2H
4. The molecular partition function can
be written as q = qT qR qV qE.
(A) 1 and 2 (B) 2, 3 and 4
(C)
(C) 1, 3 and 4 (D) All are correct
17. During expansion of an ideal gas for a
given volume change, the change in
CO 2H pressure in adiabatic process (Δ Pad ) is
______ that of isothermal process (Δ P is ).
(D) (A) Equal to (B) Exactly half
(C) Smaller than (D) Larger than
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18. Huckel MO energy levels of ethylene are 20. Identify the heterocycle formed
(A) α + 2β; α − 2β R
(B) α + β; α − β + DMF + POCl3 Heterocycle
0 N
(C) α + 12 β; α − 12 β
CH2 Ph
(D) α + 3β; α − 3β
19. Match the following : H CHO
CH3 H (A)
N Cl
I. Maleic acid 1.
CO2H R Cl
H3C
(B)
H 3C H CHO
N
II. Citraconic acid 2. CHO
H CO2H
(C)
R N Cl
H3C CO2H
R CHO
III. Crotonic acid 3.
H CO2H (D)
N Cl
H CO2H
21. The dark purple colour of KMnO4 is due to
IV. Tiglic acid 4. (A) d-d transition
H CO2H
(B) Absorption edge transition
CH3CH2 H
(C) Charge transfer process
(D) σ → π * transition
5.
H3C CO2H 22. 19F NHR spectrum of PCl2F3 shows
I II III IV (A) Two triplets and two doublets
(A) 1 4 2 3 (B) Two triplets and one doublet
(B) 4 3 2 1 (C) Two doublets and two triplets
(C) 3 1 5 2
(D) One singlet and two triplets
(D) 2 3 1 5
IIIG 6 A-02-03
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*A0203*
23. The product formed in the following 25. Match the following :
reaction is
List I List II
CH OH Me
+
I. Hψ = Eψ 1. Planck
H ,
⎯⎯⎯→ X
−H 2 O ,
II. E = hν 2. Born
CH3 −H +
X is III. | ψ |2 3. Dirac
CH3
IV. λ = h mV 4. De Broglie
CH3
(A) (B) 5. Schrodinger
I II III IV
(A) 5 1 2 4
CH3
(B) 1 2 3 4
CH3 (C) 4 5 2 1
(C) (D) (D) 3 2 4 1
CH3
CH3
26. Identify from the following systems in
which orbital contribution to magnetic
moment is expected
24. Predict the product of dipolar addition
⊕ I. [Mn(H2O)6 ] 2 +
N3 + MeOOC C ≡ CCOOMe ⎯⎯→ Product
N
II. [Mn Br4 ] 2−
N N
(A) III. [Fe(CN)6 ] 3−
Me OOC
IV. [Co(H2 O )6 ] 2 +
COO Me
N
N NH (A) I, II (B) II, III
(B)
Me OOC
(C) III, IV (D) I, IV
COO Me
27. Mossbauer spectroscopy is concerned
with
N
I. Doppler effect
HN
(C) NH
II. Photoelectric effect
Me OOC COO Me III. Recoil energy
N
IV. Cotton effect
N C COO Me
(A) I, II (B) I, III
(D) C N
Me OOC
(C) II, III (D) II, IV
IIIG 7 A-02-03
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*A0203*
28. Match the following : 31. Assertion (A) : In a catalysed reaction
a small amount of the
List – I List – II
catalyst brings a large
(Compound) (Nature) change in the rate of
I. K2 Cr2 O7 1. Anticancer agent the reaction.
II. EDTA 2. Reductant Reason (R) : A catalyst doesnot
participate in the
III. KI 3. Chelating agent
reaction.
IV. Cis-Pt (NH3)2 Cl2 4. Oxidant (A) Both A and R are true but R is not the
5. Desiccant correct explanation of A
I II III IV (B) A is true R is false
(A) 4 3 2 1 (C) A is false R is true
(B) 2 3 4 1 (D) Both A and R are true and R is the
(C) 5 3 2 1 correct explanation for A
(D) 5 3 4 1
32. Identify the product resulting from singlet
29. The reaction given below is an example
oxygen and cyclohexadiene
of
O O
Bu
ZnI +
I
Ph
Bu
+ O12 ⎯⎯→ Product
Ph Pd (PPh 3) 4
(A) Nazarov reaction O
(B) Nef reaction (A) O
(C) Negishi reaction
(D) Nicholas reaction O
30. Select the correct statements from the (B)
following : O
1. Coagulation of a colloid is the
reversible aggregation of dispersed O
phase.
2. Flocculation of a colloid is the (C)
O
irreversible aggregation of the
dispersed phase.
3. Colloids are purified by electrodialysis. O
O
4. Hydrophobic colloids are flocculated
most efficiently by the ions of opposite
charge. (D)
(A) 1, 3 and 4 (B) 2, 3 and 4
(C) 1, 2 and 3 (D) 3 and 4
IIIG 8 A-02-03
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*A0203*
33. Identify prontosil from the following 35. The quadrupole nuclei among the
following are
OH 12
I. C
II. 13C
(A) III. 14N
OH
OH IV. 35Cl
(A) I, III (B) II, III
CH3
OH
(C) II, IV (D) III, IV
36. In the extraction of metal ions from water
(B) into an organic solvent, some of the
NO2 desirable characteristics of the organic
solvent are
(C) H2N N N SO2 NH2 I. Low miscibility with water
II. Low toxicity
NH2
III. High miscibility with water
(D) H2N N N SO2 NH2
IV. High toxicity
(A) I, II (B) II, III
34. Match the following :
(C) III, IV (D) I, IV
List – I List – II
37. Assertion (A) : The entropy of a
(Complex) (Hybridization of gaseous mixture is
Central Atom) greater than the sum of
I. [Pt Cl4 ] 2 − 1. sp3 the entropies of the
individual gases.
II. [Ni(CO)4 ] 2. dsp2
Reasoning (R) : All spontaneous
III. [Fe(CO)5 ] 3. dsp3 processes are
IV. [Cr(CO)6 ] 4. d2sp3 accompanied by an
increase in entropy.
5. d3sp3
(A) A is true and R is false
I II III IV (B) A is false and R is true
(A) 1 2 5 4 (C) A and R are true but R is not the
(B) 2 1 3 4 correct explanation of A
(C) 3 1 4 2 (D) A and R are true and R is the correct
(D) 2 1 5 4 explanation of A
IIIG 9 A-02-03
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*A0203*
38. The correct statements among the 40. The Z, Z, Z, Z, Z – isomer of [10] annulene
following are is
1. A catalyst does not affect the H
(A) H
equilibrium constant.
2. Le Chatelier’s principle states that a
system at equilibrium, when subjected
to a disturbance responds in a way that (B)
minimizes the effect of the disturbance.
3. Increase in temperature favours the
reactants in endothermic reactions and (C)
products in exothermic reactions.
4. Oxidation is the removal of electrons
from a species and reduction is the (D)
addition of electrons to a species.
(A) 1, 2 and 3 (B) 1, 2 and 4
(C) 1, 3 and 4 (D) 2, 3 and 4 41. When benzaldehyde is treated with SF4,
the product X is obtained. Identify ‘X’
39. Match the following :
among the following.
List – I List II
CHO
(Species) (Nature) CHO
I. Chlorophyll 1. Contains Co (III) ion (A) (B)
F
F
II. Haemoglobin 2. Non-heme iron sulphur
protein CHO
CHF2
III. Vitamin B12 3. Contains Mg (C) (D)
IV. Rubredoxin 4. Anticancer drug F
5. Contains Fe (II) 42. In quantum mechanical tunnelling the
transmission coefficient
I II III IV
(A) Increases with the thickness of the barrier
(A) 1 2 5 4 (B) Decreases exponentially with the
(B) 3 5 1 2 thickness of the barrier
(C) Decreases with the square of the
(C) 5 4 3 1 thickness of the barrier
(D) 3 2 4 5 (D) Doesnot depend on the thickness of
the barrier
IIIG 10 A-02-03
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*A0203*
43. Example of fermions are 46. Which of the following exhibit quadrupole
(A) Electron and proton splitting ?
I. K 4 [Fe(CN)6 ] II. K 3 [Fe(CN)6 ]
(B) Photon and proton
III. [Fe(H2O)6 ] Cl3 IV. Fe(CO)5
(C) Electron and photon
(A) I, II (B) I, III
(D) Photons (C) II, III (D) II, IV
44. The molecule H2O2 belongs to _______ 47. Assertion (A) : Zn2+ ion is zinc finger
proteins is bound to
point group.
S2N2 system.
(A) C2v (B) C2h
Reason (R) : Zn2+ ion is borderline
(C) D2h (D) C2 acid and is stable with
borderline S 2N 2
45. Match the following system.
List – I List – II (A) Both A and R are true and R is the
correct explanation of A
I. Joule-Thomson 1. PV = constant (B) Both A and R are true but R is not the
coefficient correct explanation of A
qrev (C) A is true but R is false
II. Equation of state 2. (D) A is false but R is true
T
of a gas at its Boyle 48. Match the following :
temperature List – I List – II
qirrev (Ion) (Electron Configuration)
III. Entropy change 3. 3+
T I. Ce 1. [Xe] 4f4
of a system during II. Pm3+ 2. [Xe] 4f1
irreversible process III. Gd3+ 3. [Xe] 4f5
⎛ δT ⎞ IV. Lu3+ 4. [Xe] 4f7
IV. Vant Haffs reaction 4. ⎜ δP ⎟ 5. [Xe] 4f14
⎝ ⎠H
I II III IV
isotherm
(A) 2 4 1 3
5. K p α e − Δ G° / RT (B) 1 2 5 4
(C) 2 1 4 5
⎛ δP ⎞ (D) 1 3 4 5
6. ⎜ δT ⎟
⎝ ⎠H
49. A linear molecule having N atoms has
I II III IV
________ number of independent modes
(A) 3 2 1 4
of vibration.
(B) 4 1 2 5
(A) 3N – 5 (B) 3N – 6
(C) 6 1 2 5
(C) 3N (D) 3N – 3
(D) 4 3 6 2
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50. Lowest allowed energy is equal to zero 54. The standard reduction potentials of Fe3+,
for a Fe2+/Pt and Fe2+/Fe electrodes at 25°C
(A) Harmonic oscillator are +0.771V and – 0.440V respectively.
(B) Particle in a two dimensional box The standard emf of the cell in which the
(C) A rigid rotator following reaction takes place is
(D) Hydrogen atom Fe + 2Fe3+ → 3Fe 2+
51. Identify the product in the following (A) + 0.331 V (B) – 0.331 V
reaction (C) – 1.211 V (D) +1.211 V
Cro3 55. Assertion (A) : The pH of aqueous
X
AcOH solution of NaCl is 7.0
Reason (R) : Aqueous solutions of
X is CO2H all salts are neutral.
(A) A and R are true and R is the correct
CO 2H explanation of A
(A) (B) (B) A and R are true but R is not the
CO 2H correct explanation of A
CO2H (C) A is true and R is false
CO2H (D) A is false and R is true
CO2H
56. Predict the product formed under
(C) (D) cyclization conditions
COOME
OAC
CO2H
COOME +
R
52. Match the following NH2
I. Aerosol 1. Cyclopropane + NaH + THF ⎯⎯→ Pr oduct
II. Insecticide 2. Iodoform
MeOOC R
III. Anaesthetic 3. P-dichlorobenzene
(A)
IV. Antiseptic 4. Freon N O
H
5. CCl4
I II III IV MeOOC
R
(A) 4 3 1 2 (B)
(B) 2 3 4 1 N
H
O
(C) 3 2 1 4
MeOOC
(D) 4 5 3 2
(C)
R N O
53. For a one component system the H
maximum number of phases that can
MeOOC
coexist at equilibrium are
(A) 4 (B) 3 (D)
N O
(C) 2 (D) 1 R
H
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57. In the following reaction 59. Assertion (A) : CO is a strong ligand.
Reason (R) : It acts only as a σ
donor.
CHO a) Alkaline KMNO4 (A) Both A and R are true and R is the
b) Cromic acid correct explanation of A
(B) Both A and R are true but R is not the
correct explanation of A
One of the products is (C) A is true but R is false
(D) A is false but R is true
CHO
CHO 60. Which commercial product comes from
O
cellulose ?
(A) (B)
CO2H (A) Nylon (B) Rayon
CH3
(C) Dacron (D) Orlon
CO2H 61. Assertion (A) : Cluster formation by a
CHO metal is inversely
O proportional to its
(C) (D) effective nuclear
CH3 charge.
Reason (R) : Nuclear charge
58. Match the following : contracts the metal
orbitals meant for
List – I List – II overlap.
(A) Both A and R are true and R is the
(Compound) (Nature)
correct explanation of A
I. HCl 1. Conjugate base of NH4+ (B) Both A and R are true but R is not the
correct explanation of A
II. NH3 2. Arrhenius base (C) A is true but R is false
III. AlCl3 3. Conjugate acid of NH4+ (D) A is false but R is true
IV. NaOH 4. Lewis acid 62. An enzyme enhances the rate of the
reaction by
5. Bronsted acid (A) Increasing the number of collisions
I II III IV between the reactants
(B) Increasing the velocity of the reacting
(A) 3 1 5 2 molecules
(B) 5 3 4 2 (C) Providing energy to the reacting
(C) 4 1 5 2 molecules
(D) Decreasing the activation energy of
(D) 5 1 4 2
the reaction
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63. Assertion (A) : The d1 and d8 systems 67. Predict the [4+2] Diels-Alder cycloaddition
have the same number product with right stereochemistry
of microstates.
O
Reason (R) : According to hole
formalism, dn ≡ d10 −n + Product
where n is the number
MeO
of electrons O
(A) Both A and R are true and R is the
correct explanation of A
(B) Both A and R are true but R is not the
correct explanation of A
(C) A is true but R is false
(D) A is false but R is true
64. For the photolysis of HI → H2 + I2 , the
following mechanism is proposed
HI + hv → H. + I .
H. + HI → H 2 + I .
I. + I. → I2
The quantum yield of this reaction is
(A) 0.5 (B) 1.0
(C) 2.0 (D) 4.0
65. Assertion (A) : ESR spectroscopy is
not applicable for H 2
molecule.
Reason (R) : H2 molecule contains a
single bond between
the H atoms.
(A) Both A and R are true and R is the
correct explanation of A
(B) Both A and R are true but R is not the
correct explanation of A 68. An electron of mass ‘m’ is confined to a
(C) A is true but R is false one dimensional box of length ‘l’. The
(D) A is false but R is true frequency of the radiation absorbed during
its excitation from its second energy level
66. 1, 2 – Disubstituted olefins having E/z to third level is
isomerism can be identified by 1H–nmr
using 5h h
(A) 2 (B)
(A) Chemical shift 8ml 8ml2
(B) Deutereum exchange
3h 4h
(C) Solvent (C) 2 (D)
(D) Coupling constant 8ml 8ml2
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69. The rate of the reaction is ___________ 72. Predict the reagent required for the regio-
the number of activated molecules, when selective transformation (1, 4 – addition)
it is controlled by the steric factor. O O
(A) Greater than (B) Not related to
(C) Less than (D) Equal to
70. According to Wade’s rules, structures of (A) Me Mg Br (B) MeLi
B10 C2 H12 and (B9 C2 H12)2– are respectively (C) [Me Mg Br + CuI] (D) LDA/MeI
I. Closo II. Nido
73. Indicate the catalyst used in the Wacker
III. Arachno IV. Hypho reaction having industrial importance
(A) I, II (B) II, III (A) Zn (B) Cd
(C) Pd(II) (D) Hg
(C) I, IIII (D) II, IV
74. Inform the selectivity of product formed in
71. Assertion (A) : Both the complexes the Heck reaction
proceeding by I
dissociative mechanism, Pd(OAc )2
+ H2C = CH − COOH ⎯⎯ ⎯ ⎯→
[Co(NH3 )4 Cl2 ]+ Br NEt3
undergoes much faster
Product
acid hydrolysis
I
reaction than
[Co(NH3 )5 Cl] 2+ (A)
CH = CH − COOH
Reason (R) : The rate of loss of I
chloride decreases as (B)
Br
charge on the complex I
CH = CH − COOH
increases.
Br
(C) HOOC – HC = HC
(A) Both A and R are true and R is the
correct explanation of A CH = CH − COOH
(D)
(B) Both A and R are true but R is not the Br
correct explanation of A 75. The number of ESR signals formed in the
(C) A is true but R is false spectrum of benzene anion radical is
(A) 5 (B) 6
(D) A is false but R is true
(C) 7 (D) 8
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Space for Rough Work
IIIG 16 A-02-03Official key not published for this paper.
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Source: Telangana State Eligibility Test. Question paper published by Telangana State Eligibility Test.