UKPSC Lab Assistant 2024: Lab Assistant, Higher Education (Group-C) Exam, CHEMISTRY
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1. In the Lassaigne’s test of nitrogen the Prussian blue colour is obtained due to
(a) Fe4[Fe(CN)6]3 (b) Na4[Fe(CN)6]3 (c) FeSO4 (d) CuSO4
2. The IUPAC name of formic acid
(a) Butanoic acid (b) Propanoic acid (c) Ethanoic acid (d) Methanoic acid
3. The formula of Acrolein is
(a) CH2 = CH – COOH (b) CH2 = CH – CHO
(c) CH2 = CH – CN (d) CH2 = CH – CONH2
4. Vinegar is primarily composed of
(a) Nitric acid (b) Tartaric acid (c) Citric acid (d) Acetic acid
5. Carbon and hydrogen are detected by heating the compound with
(a) CuO (b) Ag2O (c) Cu2O (d) CaCO3
6. Which one of the following order of relative strength of acids is correct ?
(a) ClCH2COOH > FCH2COOH > BrCH2COOH
(b) FCH2COOH > ClCH2COOH > BrCH2COOH
(c) ClCH2COOH > BrCH2COOH > FCH2COOH
(d) BrCH2COOH > ClCH2COOH > FCH2COOH
7. Amino acids with the aliphatic ‘R’ group are
(a) Serine, Threonine, Cysteine (b) Glycine, Alanine, Leucine
(c) Lysine, Arginine, Histidine (d) Phenylalanine, Tyrosine, Tryptophan
8. Purine base found in RNA is
(a) Cytosine (b) Thymine (c) Guanine (d) Uracil
9. Benzene diazonium chloride on reaction with phenol in weakly basic medium gives
(a) Diphenyl ether (b) p-hydroxy azobenzene
(c) p-amino azobenzene (d) Chlorobenzene
10. What is the common name of
HOOC – (CH2)4 – COOH ?
(a) Adipic acid (b) Glutaric acid (c) Succinic acid (d) Malonic acid
11. Which of the following vitamins helps in blood clotting ?
(a) Vitamin A (b) Vitamin C (c) Vitamin D (d) Vitamin K
12. Identify the hormone that regulates the glucose level in blood.
(a) Glucagon (b) Insulin (c) Oxytocin (d) Vasopressin
13. Which colour spots are seen when TLC plate is kept in iodine chamber ?
(a) Green (b) Red (c) Yellow (d) Brown
Series-A 2 PDC
Text of page 4
14. A carbohydrate, commonly known as inverted sugar, is
(a) Sucrose (b) Maltose (c) Lactose (d) Cellulose
15. The number of carbon atom/s in formaldehyde is
(a) 1 (b) 2 (c) 3 (d) 4
16. The molecular formula of pentanoic acid is
(a) C5H11O2 (b) C5H9O2 (c) C5H10O (d) C5H10O2
17. The purification method where solid substances change from solid to vapour state without
passing through the liquid state, is called as
(a) Distillation (b) Crystallization
(c) Sublimation (d) Differential extraction
18. What is the basis for the process of crystallization ?
(a) Difference in solubility (b) Difference in boiling point
(c) Difference in melting point (d) Difference in temperature
19. Which one of the following is a primary amine ?
(a) N-Methyl aniline (b) Ethyl amine
(c) Dimethyl amine (d) Trimethyl amine
20. Which one of the following statement is incorrect ?
(a) Excess vitamin intake is harmful. (b) Vitamin can be produced by plants.
(c) Vitamin deficiency causes diseases. (d) Vitamins contain amino groups.
21. Which one of the following is a non-reducing disaccharide ?
(a) Galactose (b) Maltose (c) Sucrose (d) Trehalose
22. If the non-volatile impurities contaminate the liquid, its boiling point gets :
(a) Depressed (b) Elevated
(c) Remains same (d) First depressed then elevated
23. Glass does not possess a sharp melting point, because
(a) it is an amorphous solid. (b) it is a crystalline solid.
(c) it is a kind of rubber. (d) it is made up of only one substance.
24. Which is commonly used as a food preservative ?
(a) Tetrazine (b) Sorbitol
(c) Terephthalic acid (d) Sodium benzoate
25. The shape of trimethylamine is
(a) square planar (b) see-saw (c) pyramidal (d) tetrahedral
26. Which one of the following statements is true about protein ?
(a) Proteins are Polyhydroxy aldehydes and ketones.
(b) Proteins are polymers of nucleotides.
(c) Proteins are polymers of amino acids.
(d) Proteins are polymers of disulphide bridges.
Series-A 4 PDC
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14.
(a) (b) (c) (d)
15.
(a) 1 (b) 2 (c) 3 (d) 4
16.
(a) C5H11O2 (b) C5H9O2 (c) C5H10O (d) C5H10O2
17. , ,
(a) (b) (c) (d)
18. ?
(a) (b)
(c) (d)
19. ?
(a) N- (b)
(c) (d)
20. ?
(a) (b)
(c) (d)
21. ?
(a) (b) (c) (d)
22. ,
(a) (b)
(c) (d)
23. ,
(a) (b)
(c) (d)
24. ?
(a) (b) (c) (d)
25.
(a) (b) (-) (c) (d)
26. ?
(a)
(b)
(c)
(d)
PDC 5 Series-A
Text of page 6
27. Identify the product A in the following reaction :
(i) Ag2O
CH3CH2COOH A
(ii) Br2/CCl4
(a) CH3 – Br (b) CH3 – CH2 – Br
(c) CH3 – CH2 – CH2 – Br (d) CH3 – CH3
28. Benzoic acid reacts with conc. HNO3 and conc. H2SO4 to give
(a) o-nitrobenzoic acid (b) p-nitrobenzoic acid
(c) m-nitrobenzoic acid (d) o, p-dinitrobenzoic acid
29. An aldehyde on reaction with primary amine forms
(a) Grignard reagent (b) Schiff’s base
(c) Tollen’s reagent (d) Diazonium salt
30. What is used to preserve dead animal bodies ?
(a) HCHO (b) HCOOH (c) CH3COOH (d) CH3CHO
31. A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives
(a) Benzyl alcohol and Sodium formate (b) Sodium benzoate and Methanol
(c) Benzyl alcohol and Methanol (d) Sodium benzoate and Sodium formate
32. Which one of the following is not an indicator ?
(a) Methyl orange (b) Methyl red (c) Litmus (d) Benzophenone
33. The alkali and alkaline earth metals belong to which groups ?
(a) I and III Groups (b) I and IV Groups (c) I and II Groups (d) III and IV Groups
34. According to Bronsted-Lowry concept, an acid is a substance that
(a) Accepts a proton (b) Releases a proton
(c) Accepts an electron pair (d) Releases an electron pair
35. A salt of weak acid and weak base on hydrolysis gives a solution which is
(a) acidic
(b) basic
(c) neutral
(d) sometimes acidic, sometimes basic and sometimes neutral
36. According to Lewis concept, an acid is acceptor of :
(a) Proton (b) Base (c) Electron (d) Electron pairs
37. The concept of pH was introduced by
(a) Arrhenius (b) Bronsted (c) Lewis (d) Sorenson
38. The pH value of an aqueous solution of CH3COONa is
(a) equal to 7 (b) equal to 0 (c) less than 7 (d) more than 7
39. The & forms of D-Glucose are known as
(a) Anomer (b) Epimer (c) Racemic mixture (d) Enediol
Series-A 6 PDC
Text of page 7
27. A
(i) Ag2O
CH3CH2COOH A
(ii) Br2/CCl4
(a) CH3 – Br (b) CH3 – CH2 – Br
(c) CH3 – CH2 – CH2 – Br (d) CH3 – CH3
28. HNO3 H2SO4
(a) o- (b) p-
(c) m- (d) o, p-
29.
(a) (b)
(c) (d)
30. ?
(a) HCHO (b) HCOOH (c) CH3COOH (d) CH3CHO
31. NaOH
(a) (b)
(c) (d)
32. ?
(a) (b) (c) (d)
33. - ?
(a) I III (b) I IV (c) I II (d) III IV
34. -
(a) (b)
(c) (d)
35.
(a) (b)
(c) (d) , ,
36.
(a) (b) (c) (d)
37. pH
(a) (b) (c) (d)
38. CH3COONa pH
(a) 7 (b) 0 (c) 7 (d) 7
39. D-
(a) (b) (c) (d)
PDC 7 Series-A
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40. The second electron affinity of an electron is always
(a) zero (b) positive (c) negative (d) infinity
41. The boiling point of H2O is
(a) less than H2S (b) more than H2S (c) equal to H2S (d) zero
42. Which one of the following is most polar bond ?
(a) H – Cl (b) H – F (c) H – I (d) H – Br
43. Deuterium is generally known as
(a) Heavy hydrogen (b) Light hydrogen
(c) Double hydrogen (d) Gas hydrogen
44. The boiling point of water at 01 atm pressure will be
(a) 60 °C (b) 40 °C (c) 100 °C (d) 120 °C
45. The density of ice is
(a) less than water of 0 °C – 4 °C (b) more than water of 0 °C – 4 °C
(c) equal to water of 0 °C – 4 °C (d) zero
46. Which one is used in the formation of Atom bomb among the following ?
(a) Thorium (b) Neptunium (c) Plutonium (d) Uranium
47. Lime water test is relevant for the following acidic radical :
(a) SO23– (b) CO32– (c) NO–2 (d) Cl –
48. Which one of the following is not a Lewis base ?
(a) NH3 (b) CN– (c) AlCl3 (d) ROH
49. The unit of the viscosity is
(a) dynes/cm (b) g/ml (c) centipoise (d) g/litre
50. The heat of neutralization of all strong acids and strong bases is
(a) nearly the same (b) equal to zero
(c) not fixed (d) depends on nature of acid
51. An acid is a compound that gives H+ ions in water and a base is a compound that gives OH–
ions in water. This concept was given by :
(a) Lewis (b) Bronsted (c) Arrhenius (d) Lowry
52. Water is a liquid in ordinary condition because of
(a) Hydrogen bonding (b) Covalent bonding
(c) Ionic bonding (d) None of these
53. NH4OH becomes weaker in the presence of NH4Cl due to
(a) Ionization (b) Common ion effect
(c) Hydrolysis (d) Neutralization
54. The pH of 0.1 M NaOH solution will be
(a) 1 (b) 0.1 (c) 13 (d) 14
Series-A 8 PDC
Text of page 10
55. End point is the sign of the
(a) Beginning of reaction (b) No reaction
(c) Partial initiation (d) Completion of reaction
56. Among the following which one is not a transition element ?
(a) Fe (b) B (c) Cu (d) Au
57. The normality of the Glacial acetic acid is
(a) 17 N (b) 12 N (c) 36 N (d) 16 N
58. The normality of the pure and concentrated H2SO4 is
(a) 11 N (b) 36 N (c) 10 N (d) 2 N
59. The efficiency of adsorbent increases with the increase in
(a) Viscosity (b) Surface area (c) Surface tension (d) Number of ions
60. Physical adsorption is a process :
(a) Reversible (b) Exothermic (c) Irreversible (d) None of these
61. The compound which cannot reduce the Fehling solution is
(a) HCHO (b) HCOOH (c) CH3CHO (d) CH3COOH
62. Bayer’s reagent is
(a) Alkaline solution of KMnO4 (b) Neutral solution of KMnO4
(c) An acidic solution of KMnO4 (d) None of these
63. In the titration of oxalic acid with KMnO4, which indicator is used ?
(a) Phenolphthalein (b) Methyl orange
(c) N-Phenylanthranilic acid (d) Self indicator, KMnO4
64. An organic compound is soluble in water. It gives positive silver mirror test and Molisch
Test. The compound is
(a) Glucose (b) Formic acid (c) Benzoic acid (d) Acetaldehyde
65. The order of increasing size of the following species is :
(a) K+, Ca2+, Cl –, S2– (b) S2–, Cl –1, Ca2+, K+
(c) K+, Ca2+, S2–, Cl –1 (d) Ca2+, K+,Cl –, S2–
66. Benzaldehyde reacts with acetic anhydride in the presence of sodium acetate at 180 °C to
form one of the following :
(a) Cinnamic acid (b) Picric acid (c) Salicylic acid (d) TNT
67. Following reaction gives the main product :
CH CH CH – OH HBr ?
3 2 2
(a) 2-Bromopropane (b) 1-Bromopropane
(c) Propanoic acid (d) Propane
68. Aqua regia is the mixture of one of the following :
(a) 3 part HNO3 + 1 part HCl (b) 2 part HNO3 + 1 part HCl
(c) 1 part HNO3 + 3 part HCl (d) 1 part HNO3 + 1 part HCl
Series-A 10 PDC
Text of page 12
69. Which of the following polymer is not addition polymer ?
(a) Polyethene (b) Teflon (c) Orlon (d) Nylon-6,6
70. The orbital in order of increasing energy for a multi-electron atom is
(a) 1s, 2p, 3s, 3d, 4p, 5s, 4d, 5p, 4f (b) 1s, 2p, 3s, 3d, 4p, 4d, 5s, 5p, 4f
(c) 1s, 2p, 3s, 3d, 4p, 4d, 4f, 5s, 5p (d) 1s, 2p, 3s, 3d, 4p, 5p, 4d, 4f, 5s
71. The relation between H and E is
(a) E = H + nRT (b) H = E – nRT
(c) H = E + nRT (d) H + E = nRT
72. Phenol reacts with conc nitric acid to give
(a) Anisole (b) Picric acid (c) Benzoic acid (d) Benzene
73. In benzaldehyde, all ring carbons, the carbonyl carbon and the carbonyl oxygen are
hybridized
(a) sp (b) sp3 (c) sp2 (d) sp3d
74. The correct order of the strength of acidity of the following compounds is :
(a) HF < HCl < HBr < HI (b) HI > HBr > HCl > HF
(c) HF > HBr > HCl > HI (d) HF < HBr < HCl < HI
75. The shape of NH3 is
(a) trigonal pyramidal (b) linear
(c) tetrahedral (d) trigonal planar
76. Which ionic compound is not an example of cubic crystal system ?
(a) NaCl (b) CsCl (c) CaO (d) CaCO3
77. Tollen’s reagent is
(a) Moist Ag2O (b) AgNO3 + NH4OH (c) AgNO3 / H+ (d) None of these
78. In Victor Meyer test, which of the following gives blood red colour ?
OH
|
(a) CH3CH2OH (b) H3C – C H – CH3 (c) (CH3)3 – C – OH (d) None of these
79. Night-blindness is caused due to the deficiency of
(a) Vitamin D (b) Vitamin E (c) Vitamin A (d) Vitamin K
80. How many sigma bonds are present in benzene molecule ?
(a) 6 (b) 12 (c) 3 (d) 4
81. Oxidation state of zero is exhibited by
(a) Fe(CO)5 (b) Na2Ni(CN)4 (c) K3Cu(Cu)4 (d) CrO2Cl2
82. The least count of burette is
(a) 0.1 ml (b) 0.01 ml (c) 1.0 ml (d) 10 ml
83. The unit of specific conductance is
(a) ohm cm (b) ohm–1 cm (c) ohm cm–1 (d) ohm–1 cm–1
Series-A 12 PDC
Text of page 14
84. Which reagent is used in the saponification ?
(a) NaOH (b) HCl (c) NH4Cl (d) CH3OH
85. Which one is the correct order of basic strength ?
(a) C6H5NH2 < C2H5NH2 < (C2H5)2 NH < NH3
(b) C2H5NH2 < NH3 < (C2H5)2 NH < C6H5NH2
(c) (C2H5)2 NH > C2H5NH2 > NH3 > C6H5NH2
(d) NH3 > C2H5NH2 > (C2H5)2 NH > C6H5NH2
86. In Lucas test, an alcohol reacts immediately and gives insoluble chloride, the alcohol is
(a) CH3OH (b) CH3CH2OH (c) (CH3)2CHOH (d) (CH3)3COH
87. Paper chromatography is a type of
(a) Adsorption chromatography (b) Partition chromatography
(c) Column chromatography (d) Thin layer chromatography
88. Reagent that can distinguish between benzaldehyde and acetophenone
(a) Iodine and Sodium hydroxide (b) Tollen’s reagent
(c) Lucas reagent (d) Both (a) and (b)
89. A compound that does not give a positive test in Lassaigne’s test for nitrogen is
(a) Urea (b) Hydrazine (c) Azobenzene (d) Phenyl hydrazine
90. Ninhydrin test is given by
(a) Proteins having proline (b) Proteins having -amino acid
(c) Proteins having hydroxyproline (d) None of these
91. The colour of o-nitrophenol
(a) Yellow (b) Orange (c) Pink (d) Blakish
92. The most suitable method of separation of 1 : 1 mixture of ortho and para-nitrophenol is
(a) Chromatography (b) Crystallization
(c) Steam distillation (d) Sublimation
93. What is the main product of the given reaction ?
Conc. HNO3
………. ?
Conc. H2SO4
(a) o-nitroacetanilide (b) p-nitroacetanilide
(c) m-nitroacetanilide (d) Benzoic acid
94. What is the product of the following reaction ?
Alkaline
KMnO4
2C6H5 – CH3 + 3O2 ?
[O]
(a) Salicylic acid (b) Benzoic acid (c) Benzene (d) Benzyl alcohol
Series-A 14 PDC
Text of page 15
84. ?
(a) NaOH (b) HCl (c) NH4Cl (d) CH3OH
85. ?
(a) C6H5NH2 < C2H5NH2 < (C2H5)2 NH < NH3
(b) C2H5NH2 < NH3 < (C2H5)2 NH < C6H5NH2
(c) (C2H5)2 NH > C2H5NH2 > NH3 > C6H5NH2
(d) NH3 > C2H5NH2 > (C2H5)2 NH > C6H5NH2
86. ,
(a) CH3OH (b) CH3CH2OH (c) (CH3)2CHOH (d) (CH3)3COH
87. ,
(a) (b)
(c) (d)
88. ,
(a) (b)
(c) (d) (a) (b)
89. ,
(a) (b) (c) (d)
90. ?
(a) (b) -
(c) (d)
91. -
(a) (b) (c) (d)
92. - 1 : 1
(a) (b) (c) (d)
93. ?
Conc. HNO3
………. ?
Conc. H2SO4
(a) o- (b) p-
(c) m- (d)
94. ?
Alkaline
KMnO4
2C6H5 – CH3 + 3O2 ?
[O]
(a) (b) (c) (d)
PDC 15 Series-A
Text of page 16
95. Which one is the strongest acid among the following ?
(a) H2SO4 (b) HClO3 (c) H2SO3 (d) HClO4
96. What is the one letter code for Tryptophan ?
(a) T (b) Y (c) W (d) M
97. In chromatography, the value of Rf is
(a) always less than 1 (b) always greater than 1
(c) equal to zero (d) None of these
98. Mathematically, Henry’s Law cannot be expressed as : (c is the concentration of the gas in
solution and P is the pressure of the gas) :
(a) c P (b) c = kP (c) k = c/P (d) k = cP
99. Lucas reagent is
(a) Anhydrous ZnCl2 and conc. HCl (b) Anhydrous ZnCl2 and conc. HNO3
(c) Hydrous ZnCl2 and conc. HNO3 (d) Hydrous ZnCl2 and H2SO4
100. The IUPAC name of (CH3)3CCH2Br is
(a) 2-bromo-2, 2-dimethyl propane (b) 1-bromo-2, 2-dimethyl propane
(c) 1-bromo-2-methyl butane (d) 1, 2-dibromo propane
101. Which is not an example of double salts ?
(a) Mohr’s salt (b) Potash alum (c) Carnalite (d) Ferrous sulphate
102. Charles’ Law is mathematically expressed as
1
(a) V P (b) P T (c) V T (d) V n
103. Which of the following test is related to carbohydrates ?
(a) Ninhydrin test (b) Lucas test (c) Molish test (d) Hinsberg test
104. Which substance is not required to prepare Hexammine Nickel (II) chloride ?
(a) Ammonium Chloride (b) Nickel Chloride
(c) Ammonia Solution (d) Ethanol
105. Upon hydrolysis sucrose gives equimolar mixture of
(a) D-Glucose and D-Mannose (b) D-Glucose and D-Galactose
(c) D-Glucose and D-Fructose (d) D-Glucose and D-Ribose
106. Which of the following is an example of essential amino acid ?
(a) Histidine (b) Tyrosine (c) Glycine (d) Glutamine
107. For a certain first order reaction t1 is 100 sec., how long will it take for the 75% reaction to
2
be completed ?
(a) 100 sec. (b) 300 sec. (c) 200 sec. (d) 400 sec.
Series-A 16 PDC
Text of page 18
108. The process by which plants form glucose, is called
(a) Respiration (b) Photosynthesis (c) Glycolysis (d) Polymerization
109. Which of the following is an example of an artificial sweetner ?
(a) Histamine (b) Morphine (c) Aspartame (d) Penicillin
110. Upon basic hydrolysis a fat or an oil gives
(a) Glycerol and Soap (b) Glycol and Soap
(c) Ethanol and Soap (d) Methanol and Soap
111. Vulcanization of rubber is done by
(a) Sulphur (b) Oxygen (c) Nitrogen (d) Hydrogen
112. Which of the following is the apparatus for differential extraction ?
(a) Separatory funnel (b) Porous sheet
(c) Packed column (d) Electric motor
113. In crystallization, the compound dissolved in a solvent is more soluble at
(a) low temperature (b) very low temperature
(c) higher temperature (d) room temperature
114. Which base is absent in DNA ?
(a) Adenine (b) Guanine (c) Cytosine (d) Uracil
115. The monomer of natural rubber is
(a) Chloroprene (b) 1, 3-Butadiene
(c) Isoprene (d) Styrene
N
116. How much Ferrous Ammonium Sulphate required for preparing 25, 250 ml solution ?
(a) 4.525 g (b) 3.922 g (c) 2.525 g (d) 7.525 g
117. Sulphuric acid is used for determination of melting points and boiling points of organic
compounds because, it has
(a) very low boiling point (b) very high boiling point
(c) strong acidity (d) None of these
118. Which one of the following is a biodegradable polymer ?
(a) Nylon-6 (b) Polyethene (c) Polyvinyl chloride (d) Cellulose
119. Which one of the following gives carbylamine test ?
(a) (b) H3CNH2 (c) (H3C)2NH (d) (CH3)3N
120. Cholesterol is a
(a) Glyceride (b) Wax (c) Steroid (d) Fat
121. The monomer of Nylon 6, 6 is/are
(a) Tetrafluoroethene
(b) 1, 3-Butadiene
(c) Phenol and Formaldehyde
(d) Hexamethylene diamine and Adipic acid
Series-A 18 PDC
Text of page 19
108. ,
(a) (b) - (c) (d)
109. ?
(a) (b) (c) (d)
110.
(a) (b)
(c) (d)
111. ,
(a) (b) (c) (d)
112. ?
(a) (b) (c) (d)
113. ?
(a) (b) (c) (d)
114. DNA ?
(a) (b) (c) (d)
115.
(a) (b) 1, 3- (c) (d)
N
116. 250 , 25 ?
(a) 4.525 . (b) 3.922 . (c) 2.525 . (d) 7.525 .
117. ,
(a) (b)
(c) (d)
118. - ?
(a) -6 (b) (c) (d)
119. ?
(a) (b) H3CNH2 (c) (H3C)2NH (d) (CH3)3N
120.
(a) (b) (c) (d)
121. 6, 6 / /
(a) (b) 1, 3-
(c) (d)
PDC 19 Series-A
Text of page 20
122. The product of the reaction is what ?
O
|| (i) LiAlH4
CH3 – CH2 – C – Cl ?
(ii) H2O
(a) Propane (b) Propanaldehyde (c) 1-Propanol (d) Propanoic acid
123. The correct structure of Benzyl alcohol is
(a) (b) (c) (d)
124. Following reaction gives the product :
O
|| AlCl3
Benzene + CH3 – C – Cl ……… ?
(a) Vanilline (b) Benzoic acid (c) Acetophenone (d) Phenyl hydrazone
N
125. How much oxalic acid is required for preparing 10, 250 ml solution ?
(a) 2.505 gm (b) 2.575 gm (c) 1.575 gm (d) 3.525 gm
126. Molality is
(a) No. of moles of the solute in one litre of solution
(b) No. of moles of the solute in one kg of solvent
(c) No. of moles of the solute in 10 kg of solvent
(d) None of these
127. Which aldehyde will give Cannizaro reaction ?
(a) CH3CH2CH2CHO (b) CH3 – CH2CHO
(c) (CH3)3 C – CHO (d) (CH3)2 CH – CH2CHO
128. Aldol condensation would not occur in
(a) CH3CHO (b) CH3CH2CHO (c) HCHO (d) CH3COCH3
129. The -Helix of protein is a common form of
(a) Primary structure (b) Secondary structure
(c) Tertiary structure (d) Quaternary structure
130. The salt undergoes cationic hydrolysis in water, the pH of the resulting solution would be
(a) equal to seven (b) less than seven (c) greater than seven (d) equal to zero
131. Which one of the following is not a radical of the III group basic radicals ?
(a) Fe3+ (b) Al3+ (c) Ba2+ (d) Cr3+
132. Which one of the following compounds gives fastest rate of dehydration ?
(a) Primary alcohol (b) Secondary alcohol
(c) Tertiary alcohol (d) Methyl alcohol
Series-A 20 PDC
Text of page 21
122. ?
O
|| (i) LiAlH4
CH3 – CH2 – C – Cl ?
(ii) H2O
(a) (b) (c) 1- (d)
123.
(a) (b) (c) (d)
124. ,
O
|| AlCl3
+ CH3 – C – Cl ……… ?
(a) (b) (c) (d)
N
125. 250 , 10 ?
(a) 2.505 . (b) 2.575 . (c) 1.575 . (d) 3.525 .
126.
(a)
(b) 1
(c) 10
(d)
127. ?
(a) CH3CH2CH2CHO (b) CH3 – CH2CHO
(c) (CH3)3 C – CHO (d) (CH3)2 CH – CH2CHO
128. ?
(a) CH3CHO (b) CH3CH2CHO (c) HCHO (d) CH3COCH3
129. - ?
(a) (b) (c) (d)
130. , pH
(a) 7 (b) 7 (c) 7 (d) 0
131. III ?
(a) Fe3+ (b) Al3+ (c) Ba2+ (d) Cr3+
132. , ?
(a) (b)
(c) (d)
PDC 21 Series-A
Text of page 22
133. Watermelon model of an atom was given by
(a) J.J. Thomson (b) Henri Becqueral (c) Marie Curie (d) Rutherford
134. The unit in which wave number is measured :
(a) Hertz (b) nano meter (c) sec–1 (d) cm–1
135. The type of bonds present in sulphuric acid molecule is/are
(a) only covalent (b) ionic and covalent
(c) coordinate and covalent (d) coordinate, covalent and ionic
136. When an arsenic atom is introduced in place of silicon in crystal lattice, the conductivity
(a) increases
(b) decreases
(c) remains the same
(d) sometimes increases and sometimes decreases
137. Degree Celsius (°C) and degree Fahrenheit (°F) are related as
9 5 9
(a) °F = 5 (°C) + 32 (b) °F = 9 (°C) + 32 (c) °F = 5 (°C) + 273 (d) °F = °C + 273
138. Atoms with same atomic number and different mass are called
(a) isobars (b) isomers (c) isotones (d) isotopes
139. Hydrogen bond is strongest in
(a) F – H ······ O (b) O – H ······ S (c) O – H ······ N (d) F – H ······ F
140. Which one is not the element of s-block in periodic table ?
(a) K (b) Al (c) Ca (d) Ra
141. The carbon-hydrogen bond length is shortest in
(a) Ethane (b) Ethene (c) Ethyne (d) Methane
142. How much gm of oxalic acid weigh for the preparation of N/30 standard solution of oxalic
acid in 250 ml flask ? (oxalic acid M.W. = 126)
(a) 0.525 gm (b) 0.400 gm (c) 0.305 gm (d) 0.500 gm
143. Bond order in N2 is
(a) 1 (b) 2 (c) 3 (d) 4
144. Treatment of aniline with Bromine water produces
(a) 2, 4, 6-Tribromoaniline (b) Bromobenzene
(c) ortho and para bromoaniline (d) N-bromoaniline
145. IUPAC name of
CH3
| |
H3C – C – CH2 – Cl
| |
CH3
(a) 1-chloro-2, 2-dimethyl propane (b) 2-chloro-2, 2-dimethyl propane
(c) 1-chloro-2-trimethyl propane (d) None of these
Series-A 22 PDC
Text of page 23
133. ?
(a) .. (b) (c) (d)
134.
(a) (b) (c) –1 (d) –1
135.
(a) (b)
(c) (d) ,
136. ,
(a) (b)
(c) (d)
137. (°C) (°F)
9 5 9
(a) °F = 5 (°C) + 32 (b) °F = 9 (°C) + 32 (c) °F = 5 (°C) + 273 (d) °F = °C + 273
138.
(a) (b) (c) (d)
139. ?
(a) F – H ······ O (b) O – H ······ S (c) O – H ······ N (d) F – H ······ F
140. s- ?
(a) K (b) Al (c) Ca (d) Ra
141. :
(a) (b) (c) (d)
142. 250 N/30
? ( = 126)
(a) 0.525 . (b) 0.400 . (c) 0.305 . (d) 0.500 .
143. N2
(a) 1 (b) 2 (c) 3 (d) 4
144.
(a) 2, 4, 6- (b)
(c) (d) N-
CH3
| |
145. H3C – C – CH2 – Cl IUPAC
| |
CH3
(a) 1--2, 2- (b) 2--2, 2-
(c) 1--2- (d)
PDC 23 Series-A
Text of page 24
146. Saccharides are known as
(a) Protein (b) Fat (c) Carbohydrates (d) Vitamins
147. Which one of the following compound has lowest anion to cation ratio ?
(a) LiF (b) NaF (c) CsI (d) CsF
148. Benzene diazonium chloride can be converted into fluorobenzene using :
(a) HBF4 (b) Cu/HF (c) CuF (d) F2
149. Which one of the following molecule/ion is diamagnetic ?
(a) O2 (b) O–2 (c) O22– (d) O+2
150. The oxide which is amphoteric :
(a) H2O (b) CaO (c) Al2O3 (d) Cl2O7
151. Which one of the following has smallest size ?
(a) Na (b) Mg2+ (c) Ne (d) O2–
152. Glycerol is
(a) Dihydric alcohol (b) Trihydric alcohol
(c) Monohydric alcohol (d) Tetrahydric alcohol
153. Which one of the following metal is present in chlorophyll ?
(a) Na (b) K (c) Mg (d) Cu
154. Enzymes are
(a) Fat (b) Lipid (c) Protein (d) Metal
155. Molecular formula of diborane is
(a) B2H6 (b) B3H5 (c) C6H6 (d) B2H4
156. Heating oxalic acid with conc. H2SO4 gives
(a) CO (b) CO2 (c) CO + CO2 (d) Cl2
157. Which one of the following atom does not have neutron ?
(a) He (b) C (c) H (d) Ne
158. Which property of an element is always a whole number ?
(a) Atomic weight (b) Equivalent weight (c) Atomic number (d) Atomic volume
159. Glass is
(a) Supercooled liquid (b) Metallic crystal
(c) Molecular crystal (d) Covalent crystal
160. Write IUPAC name of :
CH3 – C H – CH – CH – CH2OH
| | |
Cl CH 3 CH 3
(a) 2-chloro-3, 4-dimethyl pentane-5-ol (b) 4-chloro-2, 3-dimethyl pentane-1-ol
(c) 4-chloro-3, 2-dimethyl pentane-1-ol (d) None of these
Series-A 24 PDC
Text of page 26
161. Which type of filter paper is used in paper chromatography ?
(a) Butter paper (b) Whatmann filter paper
(c) Gilmann filter paper (d) Colmann filter paper
162. Which type of monosaccharide is obtained on hydrolysis of cellulose ?
(a) Fructose (b) Ribose (c) Glucose (d) Galactose
163. The main product formed in the following reaction is :
CO, HCl
Anhydrous AlCl3/CuCl
(a) (b) (c) (d)
164. The reaction of an arenediazonium salt with a cuprous salt is called
(a) Rosenmund reaction (b) Cannizaro reaction
(c) Gattermann reaction (d) Sandmeyer reaction
165. Which of the mentioned technique is helpful and used to separate two liquids ?
(a) Sublimation (b) Distillation (c) Filtration (d) Crystallization
166. Glucose is known as :
(a) Aldopentose (b) Ketopentose (c) Aldohexose (d) Ketohexose
167. Which one of the following is not a constituent of Soda Glass ?
(a) SiO2 (b) CaSiO3 (c) Na2SiO3 (d) H2SiO3
168. Sodium or potassium salts of fatty acids are called :
(a) Terpene (b) Protein (c) Soap (d) Carbohydrate
169. General formula of polysaccharide is :
(a) CnH2nOn (b) (C6H10O5)n (c) (C6H10O6)n (d) (C5H10O5)n
170. Who proposed that the structure of DNA is double helix ?
(a) Lewis and Pouling (b) Watson and Crick
(c) Howarth and Hirst (d) Tallence and Tenrate
171. Nucleoside contains :
(a) Base – Sugar (b) Base – Phosphate
(c) Base – Sugar – Phosphate (d) Sugar – Phosphate
172. Which one of the following is also called milk sugar ?
(a) Glycogen (b) Maltose (c) Sucrose (d) Lactose
173. Hormones are :
(a) Catalyst (b) Enzymes (c) Inhibitor (d) Messenger
Series-A 26 PDC
Text of page 28
174. The boiling point of water on Celsius and Kelvin scale are respectively
(a) 373, 273 (b) 0, 273 (c) 273, 373 (d) 100, 373
175. Which one of the following formula is correct representation of Potash alum (Phitkari) ?
(a) K2SO4Cr2(SO4)3 24H2O (b) K2SO4Al2(SO4)3 6H2O
(c) K2SO4Al2(SO4)3 24H2O (d) K2SO4Al2(SO4)3 10H2O
176. Unit of Rf value in chromatography is
(a) gram (b) cm (c) litre (d) No unit
177. At higher altitude
(a) melting point of solid increases (b) boiling point of liquid decreases
(c) boiling point of liquid increases (d) no change in boiling point
178. The sugar molecule present in nucleotide is
(a) Triose (b) Tetrose (c) Pentose (d) Hexose
179. Which one of the following is a neutral amino acid ?
(a) Arginine (b) Histidine (c) Glycine (d) Lysine
180. In the estimation of halogen by Carius method, the halogen of the organic compound is
converted into
(a) Silver oxide (b) Silver sulphate (c) Silver nitrate (d) Silver halide
181. Which method is used to separate aniline water mixture ?
(a) Sublimation (b) Steam distillation
(c) Distillation under reduced pressure (d) Crystallization
182. The product formed in the following reaction is :
Sn, HCl
(a) (b) (c) (d)
183. Carbylamine reaction is used in the test of
(a) Primary alcohol (b) Primary amine
(c) Secondary alcohol (d) Secondary amine
184. A polymer with an amide linkage is known as
(a) Nylon 6, 6 (b) Teflon (c) Bakelite (d) Terylene
185. In propanone there are
(a) nine -bonds and one -bond (b) nine -bonds and one -bond
(c) eight -bonds and two -bonds (d) eight -bonds and two -bonds
186. The mobile phase in chromatography can comprise of which of the following ?
(a) Liquid or solid (b) Gas or liquid (c) Solid or gas (d) Liquid only
Series-A 28 PDC
Text of page 29
174. ,
(a) 373, 273 (b) 0, 273 (c) 273, 373 (d) 100, 373
175. () ?
(a) K2SO4Cr2(SO4)3 24H2O (b) K2SO4Al2(SO4)3 6H2O
(c) K2SO4Al2(SO4)3 24H2O (d) K2SO4Al2(SO4)3 10H2O
176. Rf
(a) (b) (c) (d)
177.
(a) (b)
(c) (d)
178.
(a) (b) (c) (d)
179. ?
(a) (b) (c) (d)
180. ?
(a) (b) (c) (d)
181. ?
(a) (b) (c) (d)
182.
Sn, HCl
(a) (b) (c) (d)
183. ,
(a) (b) (c) (d)
184.
(a) 6, 6 (b) (c) (d)
185.
(a) - - (b) - -
(c) - - (d) - -
186. ?
(a) (b) (c) (d)
PDC 29 Series-A
Text of page 30
187. Which of the following does not belong to the category of natural polymers ?
(a) Cellulose (b) Starch (c) Rayon (d) Protein
188. In which of the following test Rochelle salt is used as a reagent ?
(a) Tollen’s test (b) Benedict test (c) Fehling test (d) Wolff kishner test
189. Which one of the following is a semi-synthetic polymer ?
(a) Polyethylene (b) Nylon 6, 6 (c) Rayon (d) Buna-S
190. Vitamin C is
(a) Lactic acid (b) Ascorbic acid (c) Citric acid (d) Picric acid
191. The non-stick layer of kitchenware contains
(a) Teflon (b) Dacron (c) Nylon (d) Acrilan
192. Bakelite is
(a) Addition Polymer (b) Elastomer Polymer
(c) Thermoplastic Polymer (d) Thermosetting Polymer
193. The S in Buna-S refers to
(a) Sulphur (b) Styrene (c) Sodium (d) Salicylate
194. The stationary phase in paper chromatography is
(a) Silica (b) Calcium carbonate
(c) Water absorbed on the paper (d) Organic solvent
195. The most suitable technique for the separation of the mixture of naphthalene and urea is
(a) Filteration (b) Crystallization (c) Sublimation (d) Distillation
196. The most commonly used developer in paper chromatography is
(a) Sugar (b) Iodine (c) Naphthalene (d) Acetic acid
197. Dacron is an example of
(a) Polyamides (b) Polypropenes (c) Polyesters (d) Polyacrylonitrile
198. Which chemical is used in boring the Cork ?
(a) Toluene (b) Ethanol (c) Phenol (d) Glycerine
199. Fractional distillation is used when
(a) difference of melting points of two solids is less.
(b) difference in boiling points of two liquids is more.
(c) difference in boiling points of two liquids is small.
(d) difference in melting points of two solids is large.
200. The correct order of acidity of following compounds is :
(a) CH3COOH > CH3CH2COOH > C6H5COOH > C6H5CH2COOH
(b) C6H5CH2COOH > C6H5COOH > CH3COOH > CH3CH2COOH
(c) C6H5COOH > C6H5CH2COOH > CH3COOH > CH3CH2COOH
(d) CH3CH2COOH > CH3COOH > C6H5CH2COOH > C6H5COOH
____________
Series-A 30 PDC
Text of page 31
187. ?
(a) (b) (c) (d)
188. ?
(a) (b) (c) (d)
189. ?
(a) (b) 6, 6 (c) (d) -S
190. C
(a) (b) (c) (d)
191. (-)
(a) (b) (c) (d)
192.
(a) (b)
(c) (d) -
193. -S S
(a) (b) (c) (d)
194.
(a) (b) (c) (d)
195.
(a) (b) (c) (d)
196.
(a) (b) (c) (d)
197.
(a) (b) (c) (d)
198. ?
(a) (b) (c) (d)
199. ,
(a) (b)
(c) (d)
200.
(a) CH3COOH > CH3CH2COOH > C6H5COOH > C6H5CH2COOH
(b) C6H5CH2COOH > C6H5COOH > CH3COOH > CH3CH2COOH
(c) C6H5COOH > C6H5CH2COOH > CH3COOH > CH3CH2COOH
(d) CH3CH2COOH > CH3COOH > C6H5CH2COOH > C6H5COOH
____________
PDC 31 Series-A
Text of page 32
Space For Rough Work / Series-A 32 PDC
Page 1 of 32
Source: Uttarakhand Public Service Commission. Question paper published by Uttarakhand Public Service Commission.