CHEMISTRY- PAGE 5
1. The Friedel-Crafts reaction of benzyl chloride gives :
1) diphenylethane
2) dichloro anthracene
3) anthracene
4) mixture of diphenylethane , dichloro anthracene and anthracene
Ans: 3
2. When thiophene is reduced with hydrogen gas in presence of Raney nickel , it forms :
1) butane and nickel sulphide
2) butene and hydrogen sulphide
3) diethyl sulphide
4) dibutyl sulphide
Ans: 1
3. Which of the following is not correct for pyridine :
1) It is basic in nature.
2) It resembles benzene in many of its properties.
3) It is formed by passing a mixture of ethylene and HCN through a red hot tube.
4) When heated with nbutyl lithium, it forms 2-n-butylpyridine.
Ans: 3
4. Select the wrong statement among the following :
1) 2-chloropropane has a plane of symmetry .
2) 2-chloropropane is achiral.
3) 2-chlorobutane does not possess a plane of symmetry.
4) 2-chlorobutane is achiral
Ans: 4
5. The different kinds of environment of hydrogen atoms in the molecule in NMR spectra is given by :
1) Number of signals
2) Intensity of signals
3) Height of the signals
4) Broadness of the signals
Ans: 1
6. Number of signals in NMR spectra of ethanol is :
1) 1
2) 2
3) 3
4) 6
Ans: 3
7. The value of M/Z for the molecular ion gives for a compound :
1) Number of protons
2) Molecular weight
3) Number of atoms
4) Molecular Formula
Ans: 2
8. The intensity of M + 1 peak can be used to know the number of :
1) C atoms only
2) N atoms only
3) Both C and N atoms
4) H atoms only
Ans: 3
9. The free radical intermediates in chemical reactions are best detected by :
1) IR Spectroscopy
2) NMR Spectroscopy
3) ESR Spectroscopy
4) UVVisible Spectroscopy
Ans: 3
10. The SI unit of radioactivity is :
1) Becquerel
2) curie
3) microcurie
4) disintegrations per minute
Ans: 1
11. Carbon nanotubes are members of which structural family?
(A) Fullerenes (B) Amines (C) Polyanilines (D) Glycerol
Ans: A
12. What is not correct for a nuclear reaction ?
1) It is related with radiations.
2) It must be balanced in terms of both mass and energy.
3) Energy changes in it are far large as compared to energy changes in chemical reactions.
4) It is influenced by external conditions like atmospheric pressure.
Ans: 4
13. What is not correct for nuclear fusion ?
1) It occurs in the nuclei of light elements.
2) In such reactions percentage efficiency of the energy conversion is very high.
3) It can be initiated at any temperature .
4) Heavy nuclei are formed in such reactions apart from the release of heavy amount of energy .
Ans: 3
14. At a given temperature , the rate constant of a given reaction , in general , is equal to the rate of the reaction
when :
1) all reactants are in same quantity.
2) all reactants are in same state.
3) concentration of all reactants is same .
4) concentration of all reactants is unity
Ans: 4
15. Zero order reaction means :
1) The reactants becomes zero at the end of reaction.
2) The molecularity of reaction is 1.
3) The rate of reaction is proportional to zero power of the concentration of reactant.
4) Rate constant is 1
Ans: 3
16. According to the salt effect , the rate constant will be independent of the charges on ions if :
1) the two reactant ions have positive charges.
2) the two reactant ions have negative charges.
3) one reacting ion has positive charge and the other having negative charge.
4) one reacting ion is reacting with neutral molecule
Ans: 4
17. What is incorrect from the view point of the Collision Theory of chemical reactions ?
1) It is based on the kinetic theory of gases.
2) It assumes that reactant molecules are hard spheres and reactions occurs due to their collisions.
3) All collisions of reacting molecules result into products.
4) Increase in temperature increases the rate of reaction.
Ans: 3
18. JouleThomson expansion is :
1) Isobaric
2) Isenthalpic
3) Isothermal
4) Isothermal and Isobaric
Ans: 2
19. Integrated Arrhenius equation helps us to :
1) find out order of the reaction.
2) find out energy of activation , if rate constant at two different temperatures is given.
3) know the molecularity of the reaction.
4) find out the rate of reaction at different temperatures.
Ans: 2
20. What is not true for thermodynamics ?
1) It is related to flow of heat.
2) It deals with energy changes accompanying all types of physical and chemical processes.
3) Its laws are applicable on matter in bulk as well as on individual atoms and molecules.
4) It helps in predicting the feasibility of a chemical reaction under the given conditions.
Ans: 3
21. Which statement related to thermodynamics is not correct ?
1) The difference between molar heat capacities of one mole of a gas at constant pressure and at constant volume is equal to the gas constant.
2) First law of thermodynamics gives no idea about the direction of flow of heat.
3) Second law of thermodynamics helps to predict whether a given process or a chemical reaction can occur spontaneously.
4) Heat is a typical form of energy , which can be completely transformed to work.
Ans: 4
22. Which of the following is used as anode in a commonly used mercury cell ?
1) Zincamalgam
2) carbon
3) paste of HgO and carbon
4) Zinc oxide
Ans: 1
23. What is not correct related to strong electrolytes ?
1) Arrhenius theory is proved to be valid when applied to strongly dissociated electrolytes.
2) DebyeHuckel theory of strong electrolytes assumes that strong electrolytes are completely dissociated in
solution.
3) Ions are not equivalent to molecules in their influence on thermodynamic properties.
4) Ions are not equivalent to molecules in their influence on transport of ions.
Ans: 1
24. Most abundant element on the earthcrust is :
1) Fe
2) Al
3) Si
4) O
Ans: 4
25. Exposure to vinyl chloride vapours carries a risk of following cancer :
1) Liver
2) Lung
3) Bladder
4) Marrow
Ans: 1
1) diphenylethane
2) dichloro anthracene
3) anthracene
4) mixture of diphenylethane , dichloro anthracene and anthracene
Ans: 3
2. When thiophene is reduced with hydrogen gas in presence of Raney nickel , it forms :
1) butane and nickel sulphide
2) butene and hydrogen sulphide
3) diethyl sulphide
4) dibutyl sulphide
Ans: 1
3. Which of the following is not correct for pyridine :
1) It is basic in nature.
2) It resembles benzene in many of its properties.
3) It is formed by passing a mixture of ethylene and HCN through a red hot tube.
4) When heated with nbutyl lithium, it forms 2-n-butylpyridine.
Ans: 3
4. Select the wrong statement among the following :
1) 2-chloropropane has a plane of symmetry .
2) 2-chloropropane is achiral.
3) 2-chlorobutane does not possess a plane of symmetry.
4) 2-chlorobutane is achiral
Ans: 4
5. The different kinds of environment of hydrogen atoms in the molecule in NMR spectra is given by :
1) Number of signals
2) Intensity of signals
3) Height of the signals
4) Broadness of the signals
Ans: 1
6. Number of signals in NMR spectra of ethanol is :
1) 1
2) 2
3) 3
4) 6
Ans: 3
7. The value of M/Z for the molecular ion gives for a compound :
1) Number of protons
2) Molecular weight
3) Number of atoms
4) Molecular Formula
Ans: 2
8. The intensity of M + 1 peak can be used to know the number of :
1) C atoms only
2) N atoms only
3) Both C and N atoms
4) H atoms only
Ans: 3
9. The free radical intermediates in chemical reactions are best detected by :
1) IR Spectroscopy
2) NMR Spectroscopy
3) ESR Spectroscopy
4) UVVisible Spectroscopy
Ans: 3
10. The SI unit of radioactivity is :
1) Becquerel
2) curie
3) microcurie
4) disintegrations per minute
Ans: 1
11. Carbon nanotubes are members of which structural family?
(A) Fullerenes (B) Amines (C) Polyanilines (D) Glycerol
Ans: A
12. What is not correct for a nuclear reaction ?
1) It is related with radiations.
2) It must be balanced in terms of both mass and energy.
3) Energy changes in it are far large as compared to energy changes in chemical reactions.
4) It is influenced by external conditions like atmospheric pressure.
Ans: 4
13. What is not correct for nuclear fusion ?
1) It occurs in the nuclei of light elements.
2) In such reactions percentage efficiency of the energy conversion is very high.
3) It can be initiated at any temperature .
4) Heavy nuclei are formed in such reactions apart from the release of heavy amount of energy .
Ans: 3
14. At a given temperature , the rate constant of a given reaction , in general , is equal to the rate of the reaction
when :
1) all reactants are in same quantity.
2) all reactants are in same state.
3) concentration of all reactants is same .
4) concentration of all reactants is unity
Ans: 4
15. Zero order reaction means :
1) The reactants becomes zero at the end of reaction.
2) The molecularity of reaction is 1.
3) The rate of reaction is proportional to zero power of the concentration of reactant.
4) Rate constant is 1
Ans: 3
16. According to the salt effect , the rate constant will be independent of the charges on ions if :
1) the two reactant ions have positive charges.
2) the two reactant ions have negative charges.
3) one reacting ion has positive charge and the other having negative charge.
4) one reacting ion is reacting with neutral molecule
Ans: 4
17. What is incorrect from the view point of the Collision Theory of chemical reactions ?
1) It is based on the kinetic theory of gases.
2) It assumes that reactant molecules are hard spheres and reactions occurs due to their collisions.
3) All collisions of reacting molecules result into products.
4) Increase in temperature increases the rate of reaction.
Ans: 3
18. JouleThomson expansion is :
1) Isobaric
2) Isenthalpic
3) Isothermal
4) Isothermal and Isobaric
Ans: 2
19. Integrated Arrhenius equation helps us to :
1) find out order of the reaction.
2) find out energy of activation , if rate constant at two different temperatures is given.
3) know the molecularity of the reaction.
4) find out the rate of reaction at different temperatures.
Ans: 2
20. What is not true for thermodynamics ?
1) It is related to flow of heat.
2) It deals with energy changes accompanying all types of physical and chemical processes.
3) Its laws are applicable on matter in bulk as well as on individual atoms and molecules.
4) It helps in predicting the feasibility of a chemical reaction under the given conditions.
Ans: 3
21. Which statement related to thermodynamics is not correct ?
1) The difference between molar heat capacities of one mole of a gas at constant pressure and at constant volume is equal to the gas constant.
2) First law of thermodynamics gives no idea about the direction of flow of heat.
3) Second law of thermodynamics helps to predict whether a given process or a chemical reaction can occur spontaneously.
4) Heat is a typical form of energy , which can be completely transformed to work.
Ans: 4
22. Which of the following is used as anode in a commonly used mercury cell ?
1) Zincamalgam
2) carbon
3) paste of HgO and carbon
4) Zinc oxide
Ans: 1
23. What is not correct related to strong electrolytes ?
1) Arrhenius theory is proved to be valid when applied to strongly dissociated electrolytes.
2) DebyeHuckel theory of strong electrolytes assumes that strong electrolytes are completely dissociated in
solution.
3) Ions are not equivalent to molecules in their influence on thermodynamic properties.
4) Ions are not equivalent to molecules in their influence on transport of ions.
Ans: 1
24. Most abundant element on the earthcrust is :
1) Fe
2) Al
3) Si
4) O
Ans: 4
25. Exposure to vinyl chloride vapours carries a risk of following cancer :
1) Liver
2) Lung
3) Bladder
4) Marrow
Ans: 1
26:-Calculate the number of microstates for 5 identical particles with their occupation numbers(1, 2, 3) in three states
A:-6
B:-12
C:-10
D:-720
Ans: C
27:-The aggregation of surfactant molecules is known as
A:-Micelles
B:-Clustures
C:-Gel
D:-Colloid
Ans: A
28:-In the Lindmann mechanism of unimolecular reactions, the observed order at very high pressure is
A:-0.5
B:-2
C:-1.5
D:-1
Ans: D
29:-Which of the following is not a fermion ?
A:-Proton
B:-Electron
C:-Neutron
D:-Photon
Ans: D
30:-An aqueous solution of NaCl and HCl is exactly neutralized by an aqueous NaOH solution. The number of components in the final mixture is
A:-1
B:-2
C:-3
D:-4
Ans: B
31:-The interplanar distance (A°) for a (100) plane in a cubic structure with the lattice parameter of 4A° is
A:-1
B:-2
C:-4
D:-8
Ans: C
32:-The hetero cyclic ring present in the aminoacid histidine is
A:-Pyridine
B:-Tetrahydropyrrol
C:-Indole
D:-Imidazole
Ans: D
33:-The biosynthetic precursor of cholesterol is
A:-Shikimic acid
B:-Mevalonic acid
C:-Gutaric acid
D:-Cinnamic acid
Ans: B
34:- Zeolite is the broad term used to describe a family of minerals called ________ .
(A) Tectosilicates (B) Pentasilicates (C) Trisilicates (D) Tetrasilicates
Ans: A
35:- Which one of the following is not a mixture?
(A) Iodized table salt (B) Distilled alcohol (C) Gasoline (D) LPG
Ans: B
36. Which one of the properties of an element is always a whole number?
(A) Atomic number (B) Atomic weight (C) Equivalent weight (D) Atomic volume
Ans: A
37. The number of water molecules in 1 L of water is _____.
(A) 18 × 1000 (B) 55.55 NA (C) NA (D) 18
Ans: B
38:-The liquid crystals have
A:-Properties of supercooled liquids
B:-Properties of amorphous solids
C:-The fluidity of a liquid and optical properties of a solid
D:-None of these
Ans: C
39:-X-ray diffraction does not give any structural information for
A:-Metallic solids
B:-Ionic solids
C:-Molecular solids
D:-Amorphous solid
Ans: D
40:-Among the following, an example of a green synthesis is
A:-Synthesis of malachite green
B:-Friedel-Craft's acylation of anisole with `Ac_(2)`` O`/anhydrous `AlCl_(3)`
C:-Jone's oxidation of benzyl alcohol to benzoic acid
D:-Diel's-Alder reaction of furan and maleic acid in water
Ans: D
41:-Monosaccharide is not react with
A:-Tollen's reagent
B:-Sodium bisulphate
C:-Acetic anhydride
D:-Hydroxylamine
Ans: B
42:-Select the polar aprotic solvent from the following
A:-DMF
B:-DMSO
C:-THF
D:-All of these
Ans: D
A:-6
B:-12
C:-10
D:-720
Ans: C
27:-The aggregation of surfactant molecules is known as
A:-Micelles
B:-Clustures
C:-Gel
D:-Colloid
Ans: A
28:-In the Lindmann mechanism of unimolecular reactions, the observed order at very high pressure is
A:-0.5
B:-2
C:-1.5
D:-1
Ans: D
29:-Which of the following is not a fermion ?
A:-Proton
B:-Electron
C:-Neutron
D:-Photon
Ans: D
30:-An aqueous solution of NaCl and HCl is exactly neutralized by an aqueous NaOH solution. The number of components in the final mixture is
A:-1
B:-2
C:-3
D:-4
Ans: B
31:-The interplanar distance (A°) for a (100) plane in a cubic structure with the lattice parameter of 4A° is
A:-1
B:-2
C:-4
D:-8
Ans: C
32:-The hetero cyclic ring present in the aminoacid histidine is
A:-Pyridine
B:-Tetrahydropyrrol
C:-Indole
D:-Imidazole
Ans: D
33:-The biosynthetic precursor of cholesterol is
A:-Shikimic acid
B:-Mevalonic acid
C:-Gutaric acid
D:-Cinnamic acid
Ans: B
34:- Zeolite is the broad term used to describe a family of minerals called ________ .
(A) Tectosilicates (B) Pentasilicates (C) Trisilicates (D) Tetrasilicates
Ans: A
35:- Which one of the following is not a mixture?
(A) Iodized table salt (B) Distilled alcohol (C) Gasoline (D) LPG
Ans: B
36. Which one of the properties of an element is always a whole number?
(A) Atomic number (B) Atomic weight (C) Equivalent weight (D) Atomic volume
Ans: A
37. The number of water molecules in 1 L of water is _____.
(A) 18 × 1000 (B) 55.55 NA (C) NA (D) 18
Ans: B
38:-The liquid crystals have
A:-Properties of supercooled liquids
B:-Properties of amorphous solids
C:-The fluidity of a liquid and optical properties of a solid
D:-None of these
Ans: C
39:-X-ray diffraction does not give any structural information for
A:-Metallic solids
B:-Ionic solids
C:-Molecular solids
D:-Amorphous solid
Ans: D
40:-Among the following, an example of a green synthesis is
A:-Synthesis of malachite green
B:-Friedel-Craft's acylation of anisole with `Ac_(2)`` O`/anhydrous `AlCl_(3)`
C:-Jone's oxidation of benzyl alcohol to benzoic acid
D:-Diel's-Alder reaction of furan and maleic acid in water
Ans: D
41:-Monosaccharide is not react with
A:-Tollen's reagent
B:-Sodium bisulphate
C:-Acetic anhydride
D:-Hydroxylamine
Ans: B
42:-Select the polar aprotic solvent from the following
A:-DMF
B:-DMSO
C:-THF
D:-All of these
Ans: D
43. At pH 7.2 and 10 Torr oxygen partial pressure, the extent of O2 binding is
(A) high for both hemoglobin and myoglobin
(B) high for hemoglobin and low for myoglobin
(C) high for myoglobin and low for hemoglobin
(D) low for both hemoglobin and myoglobin
Ans: C
44. When crystals of sodium chloride are heated in the presence of sodium vapor, they turn yellow. This is due to the formation of
(A) Schottky defects
(B) Frenkel defects
(C) F-centres
(D) H-centres
Ans: C
45. How many peaks are expected to see in AES at carbon element?
(A) 2 (B) 3 (C) 1 (D) 5
Ans: C
46. Consider a two-state system at thermal equilibrium with equal degeneracy where the excited state is higher in energy than the ground state by 0.1 eV. The ratio of the population of the excited state to that of the ground state, at a temperature for which kBT = 0.05 eV, is _________.
Ans: 0.13 : 0.14
47. Amongst the following, the group that is bound to the metal ion in coenzyme B12 is
(A) methyl
(B) cyanide
(C) adenosyl
(D) hydroxyl
Ans: C
48. Which among the following is called laughing gas popularly ?
(A) Nitrogen Penta Oxide (B) Nitrous Oxide
(C) Nitric Oxide (D) Nitrogen
Ans: B
49. Which famous Scientist’s words are chance favours only the prepared mind ?
(A) Issac Newton (B) Mux Plank (C) Louis Pasteur (D) C.V. Raman
Ans: C
(A) high for both hemoglobin and myoglobin
(B) high for hemoglobin and low for myoglobin
(C) high for myoglobin and low for hemoglobin
(D) low for both hemoglobin and myoglobin
Ans: C
44. When crystals of sodium chloride are heated in the presence of sodium vapor, they turn yellow. This is due to the formation of
(A) Schottky defects
(B) Frenkel defects
(C) F-centres
(D) H-centres
Ans: C
45. How many peaks are expected to see in AES at carbon element?
(A) 2 (B) 3 (C) 1 (D) 5
Ans: C
46. Consider a two-state system at thermal equilibrium with equal degeneracy where the excited state is higher in energy than the ground state by 0.1 eV. The ratio of the population of the excited state to that of the ground state, at a temperature for which kBT = 0.05 eV, is _________.
Ans: 0.13 : 0.14
47. Amongst the following, the group that is bound to the metal ion in coenzyme B12 is
(A) methyl
(B) cyanide
(C) adenosyl
(D) hydroxyl
Ans: C
48. Which among the following is called laughing gas popularly ?
(A) Nitrogen Penta Oxide (B) Nitrous Oxide
(C) Nitric Oxide (D) Nitrogen
Ans: B
49. Which famous Scientist’s words are chance favours only the prepared mind ?
(A) Issac Newton (B) Mux Plank (C) Louis Pasteur (D) C.V. Raman
Ans: C
50. Which of the following chemicals is known as ‘Salt Peter’ ?
(A) Potassium Chloride (B) Calcium Nitrate
(C) Sodium Nitrate (D) Potassium Nitrate
Ans: D
51. The gas dissolved in water that makes it basic is ?
(A) Carbon dioxide (B) Hydrogen (C) Ammonia (D) Sulphur dioxide
Ans: A
52. Which one of the following is considered ‘Good Cholesterol’ ?
(A) Low - Density Lipo Protein (LDL)
(B) Triglyceride
(C) High - Density Lipo Protein (HDL)
(D) Fatty acids
Ans: C
(A) Potassium Chloride (B) Calcium Nitrate
(C) Sodium Nitrate (D) Potassium Nitrate
Ans: D
51. The gas dissolved in water that makes it basic is ?
(A) Carbon dioxide (B) Hydrogen (C) Ammonia (D) Sulphur dioxide
Ans: A
52. Which one of the following is considered ‘Good Cholesterol’ ?
(A) Low - Density Lipo Protein (LDL)
(B) Triglyceride
(C) High - Density Lipo Protein (HDL)
(D) Fatty acids
Ans: C
53. The structures in which n and (n−1) corners of n-cornered polyhedrons are occupied are respectively :
(A) closo and nido (B) nido and closo
(C) closo and arachno (D) nido and arachno
Ans: A
54. The conversion of vinyl cyclopropane to cyclopentene upon heating is an example of __________ sigmatropic rearrangement.
(A) [1, 5] (B) [3, 3]
(C) [1, 3] (D) [1, 2]
Ans: C
55. The approximate ratio of the peaks at m/z values 98, 100 and 102 in the mass spectrum of 1, 2 - dichloroethane will be :
(A) 3 : 1 : 1 (B) 9 : 6 : 1
(C) 1 : 2 : 1 (D) 1 : 1 : 2
Ans: B
56. Expected number of lines in the ESR spectrum of benzene radical anion is :
(A) 6 (B) 4
(C) 7 (D) 0
Ans: C
57. Depolarisation by hydrogen ions can be prevented by use of :
(A) Nitrate ions (B) Hydrazine (C) Hydroxylamine (D) All of the above
Ans: D
58. Current observed in the absence of an electroactive species is termed :
(A) Residual current (B) Faradaic current
(C) Diffusion current (D) None of these
Ans: A
59. The decadic absorbance of a solution at a wavelength 200 nm is recorded as 1.08. Given the values of molar extinction co-efficient and path length to be 629 m2/mol and 0.00121 m, the concentration of the solution is :
(A) 0.142 M (B) 1.42 M
(C) 0.00142 M (D) 0.0142 M
Ans: C
60. Angle between (110) and (100) planes in a simple cubic crystal lattice is equal to :
(A) 15 (B) 60 (C) 45 (D) None of these
Ans: C
61. Average position of a particle in a one dimensional box of length L is :
(A) L/3 (B) L (C) 2L (D) L/2
Ans: D
62. Ground state energy for an electron confined to a potential well of width 0.4 nm is :
(A) 226.7 kJ/mol (B) 22.6 kJ/mol (C) 3.76 kJ/mol (D) None of these
Ans: A
63. Number of protons in the shielded zone of 18 - annulene is :
(A) 6 (B) 3 (C) 5 (D) 2
Ans: A
64. Silicates with continuous 3D framework :
(A) Neso silicates (B) Phyllo silicates (C) Tecto silicates (D) None of these
Ans: C
65. Which among the following are allowed transitions ?
(A) 1s → 2p (B) 2p → 3s (C) 3d → 4f (D) all of these
Ans: D
66. The Bonding in metal carbonyls can be identified using :
(A) UV spectroscopy (B) IR spectroscopy (C) C13 NMR (D) None of these
Ans: B
67. The nuclear partition function of ortho deuterium molecule is :
(A) 3 (B) 2 (C) 6 (D) None of these
Ans: C
68. The shape of [TeF5]− ion based on VSEPR theory is :
(A) Octahedral (B) Square pyramidal (C) Pentagonal (D) Triagonal bipyramidal
Ans: B
69. According to the transition state theory, the rate constant of a reaction __________ with pressure when ∆V* is negative.
(A) Decreases (B) Increases
(C) Remains unaltered (D) First decreases and then increases
Ans: B
(A) closo and nido (B) nido and closo
(C) closo and arachno (D) nido and arachno
Ans: A
54. The conversion of vinyl cyclopropane to cyclopentene upon heating is an example of __________ sigmatropic rearrangement.
(A) [1, 5] (B) [3, 3]
(C) [1, 3] (D) [1, 2]
Ans: C
55. The approximate ratio of the peaks at m/z values 98, 100 and 102 in the mass spectrum of 1, 2 - dichloroethane will be :
(A) 3 : 1 : 1 (B) 9 : 6 : 1
(C) 1 : 2 : 1 (D) 1 : 1 : 2
Ans: B
56. Expected number of lines in the ESR spectrum of benzene radical anion is :
(A) 6 (B) 4
(C) 7 (D) 0
Ans: C
57. Depolarisation by hydrogen ions can be prevented by use of :
(A) Nitrate ions (B) Hydrazine (C) Hydroxylamine (D) All of the above
Ans: D
58. Current observed in the absence of an electroactive species is termed :
(A) Residual current (B) Faradaic current
(C) Diffusion current (D) None of these
Ans: A
59. The decadic absorbance of a solution at a wavelength 200 nm is recorded as 1.08. Given the values of molar extinction co-efficient and path length to be 629 m2/mol and 0.00121 m, the concentration of the solution is :
(A) 0.142 M (B) 1.42 M
(C) 0.00142 M (D) 0.0142 M
Ans: C
60. Angle between (110) and (100) planes in a simple cubic crystal lattice is equal to :
(A) 15 (B) 60 (C) 45 (D) None of these
Ans: C
61. Average position of a particle in a one dimensional box of length L is :
(A) L/3 (B) L (C) 2L (D) L/2
Ans: D
62. Ground state energy for an electron confined to a potential well of width 0.4 nm is :
(A) 226.7 kJ/mol (B) 22.6 kJ/mol (C) 3.76 kJ/mol (D) None of these
Ans: A
63. Number of protons in the shielded zone of 18 - annulene is :
(A) 6 (B) 3 (C) 5 (D) 2
Ans: A
64. Silicates with continuous 3D framework :
(A) Neso silicates (B) Phyllo silicates (C) Tecto silicates (D) None of these
Ans: C
65. Which among the following are allowed transitions ?
(A) 1s → 2p (B) 2p → 3s (C) 3d → 4f (D) all of these
Ans: D
66. The Bonding in metal carbonyls can be identified using :
(A) UV spectroscopy (B) IR spectroscopy (C) C13 NMR (D) None of these
Ans: B
67. The nuclear partition function of ortho deuterium molecule is :
(A) 3 (B) 2 (C) 6 (D) None of these
Ans: C
68. The shape of [TeF5]− ion based on VSEPR theory is :
(A) Octahedral (B) Square pyramidal (C) Pentagonal (D) Triagonal bipyramidal
Ans: B
69. According to the transition state theory, the rate constant of a reaction __________ with pressure when ∆V* is negative.
(A) Decreases (B) Increases
(C) Remains unaltered (D) First decreases and then increases
Ans: B
70. Packing fraction of a hcp lattice is close to :
(A) 0.74 (B) 0.98 (C) 0.52 (D) None of these
Ans: A
71. Absorbance of a solution whose transmittance is 50% is :
(A) 0.699 (B) 0.301 (C) 1.301 (D) 1.699
Ans: B
72. Indicator used in the Mohrs method is :
(A) Fluorescien (B) Eosin (C) Ferroin (D) Chromate
Ans: D
73. Complexes formed by the lanthanides with hindered β-diketonates can be separated by :
(A) Gel permeation chromatography (B) Gas chromatography
(C) Gel filtration chromatography (D) Ion exchange chromatography
Ans: B
74. Rotational entropy is maximum for :
(A) H2 (B) N2 (C) Cl2 (D) O2
Ans: C
75. No. of ways in which four indistinguishable particles may be assigned to three states having Energy 1, 2 and 3 such that total energy remains 10 units is :
(A) 5 (B) 10 (C) 6 (D) 4
Ans: B
76. Value of ∆G for adsorption __________ with increase in temperature.
(A) Becomes more positive starting from a negative value
(B) Becomes more negative starting from a negative value
(C) Becomes more negative starting from a positive value
(D) None of the above
Ans: A
77. Co-catalyst used in Wackers process :
(A) Co (B) Cu (C) Mo (D) Ag
Ans: B
78. Which of the following thermal sigmatropic rearrangement is impossible ?
(A) [1, 5]H (B) [1, 7]H (C) [1, 3]H (D) None of these
Ans: C
79. Hot bands in IR spectrum is a consequence of which of the following transitions ?
(A) v=0 → v=2 (B) v=1 → v=2 (C) v=0 → v=1 (D) v=0 → v=3
Ans: B
80. The mass spectrum of an alkyl halide showed M and M+2 peaks in the intensity ratio 1 : 1. The compound is :
(A) alkyl chloride (B) alkyl bromide (C) alkyl iodide (D) cannot be predicted
Ans: B
81. The number of peaks expected in the proton decoupled CMR spectrum of toluene is :
(A) 7 (B) 6 (C) 5 (D) 2
Ans: C
82. Rotational partition function for H2 at 0 deg C is approximately :
(A) 10 (B) 15 (C) 1.5 (D) 3.5
Ans: C
83. Determination of CFSE of transition metal complexes can be done using __________ spectroscopy.
(A) Electronic (B) Rotational (C) ESR (D) NMR
Ans: A
84. The vapour phase irradiation of trans 1, 2 - dimethyl cyclohexanone will give :
(A) cis-1, 2-dimethyl cyclopentane
(B) trans-1, 2-dimethyl cyclopentane
(C) cis and trans 1, 2-dimethyl cyclohexane
(D) Mixture of (A) and (B)
Ans: D
(A) 0.74 (B) 0.98 (C) 0.52 (D) None of these
Ans: A
71. Absorbance of a solution whose transmittance is 50% is :
(A) 0.699 (B) 0.301 (C) 1.301 (D) 1.699
Ans: B
72. Indicator used in the Mohrs method is :
(A) Fluorescien (B) Eosin (C) Ferroin (D) Chromate
Ans: D
73. Complexes formed by the lanthanides with hindered β-diketonates can be separated by :
(A) Gel permeation chromatography (B) Gas chromatography
(C) Gel filtration chromatography (D) Ion exchange chromatography
Ans: B
74. Rotational entropy is maximum for :
(A) H2 (B) N2 (C) Cl2 (D) O2
Ans: C
75. No. of ways in which four indistinguishable particles may be assigned to three states having Energy 1, 2 and 3 such that total energy remains 10 units is :
(A) 5 (B) 10 (C) 6 (D) 4
Ans: B
76. Value of ∆G for adsorption __________ with increase in temperature.
(A) Becomes more positive starting from a negative value
(B) Becomes more negative starting from a negative value
(C) Becomes more negative starting from a positive value
(D) None of the above
Ans: A
77. Co-catalyst used in Wackers process :
(A) Co (B) Cu (C) Mo (D) Ag
Ans: B
78. Which of the following thermal sigmatropic rearrangement is impossible ?
(A) [1, 5]H (B) [1, 7]H (C) [1, 3]H (D) None of these
Ans: C
79. Hot bands in IR spectrum is a consequence of which of the following transitions ?
(A) v=0 → v=2 (B) v=1 → v=2 (C) v=0 → v=1 (D) v=0 → v=3
Ans: B
80. The mass spectrum of an alkyl halide showed M and M+2 peaks in the intensity ratio 1 : 1. The compound is :
(A) alkyl chloride (B) alkyl bromide (C) alkyl iodide (D) cannot be predicted
Ans: B
81. The number of peaks expected in the proton decoupled CMR spectrum of toluene is :
(A) 7 (B) 6 (C) 5 (D) 2
Ans: C
82. Rotational partition function for H2 at 0 deg C is approximately :
(A) 10 (B) 15 (C) 1.5 (D) 3.5
Ans: C
83. Determination of CFSE of transition metal complexes can be done using __________ spectroscopy.
(A) Electronic (B) Rotational (C) ESR (D) NMR
Ans: A
84. The vapour phase irradiation of trans 1, 2 - dimethyl cyclohexanone will give :
(A) cis-1, 2-dimethyl cyclopentane
(B) trans-1, 2-dimethyl cyclopentane
(C) cis and trans 1, 2-dimethyl cyclohexane
(D) Mixture of (A) and (B)
Ans: D
85. When aqueous solvents are to be used in IR spectroscopy, sample and reference cells are made of :
(A) CaCl2 (B) CaF2 (C) NaCl (D) KCl
Ans: B
86. Enantioselective epoxidation of allylic alcohols can be achieved by :
(A) Al-isopropoxide (B) Sn-isopropoxide
(C) Ti-isopropoxide diethyl tartarate (D) None of these
Ans: C
87. The residual entropy associated with a crystal with 6 possible orientations will be nearly :
(A) 10 (B) 1.5 (C) 15 (D) 3.5
Ans: C
88. The point group of 1, 1-difluoroethylene is :
(A) C3v (B) C∞v (C) C2v (D) C3h
Ans: C
89. The number of radial nodes for 4s orbital of hydrogen atom is :
(A) 0 (B) 4 (C) 3 (D) 2
Ans: C
90. The order of decreasing reactivity towards an electrophilic reagent, for the following would be
(i) benzene (ii) toluene (iii) chlorobenzene (iv) phenol
(a) (ii) > (iv) > (i) > (iii)
(b) (iv) > (iii) > (ii) > (i)
(c) (iv) > (ii) > (i) > (iii)
(d) (i) > (ii) > (iii) > (iv)
Ans: C
(A) CaCl2 (B) CaF2 (C) NaCl (D) KCl
Ans: B
86. Enantioselective epoxidation of allylic alcohols can be achieved by :
(A) Al-isopropoxide (B) Sn-isopropoxide
(C) Ti-isopropoxide diethyl tartarate (D) None of these
Ans: C
87. The residual entropy associated with a crystal with 6 possible orientations will be nearly :
(A) 10 (B) 1.5 (C) 15 (D) 3.5
Ans: C
88. The point group of 1, 1-difluoroethylene is :
(A) C3v (B) C∞v (C) C2v (D) C3h
Ans: C
89. The number of radial nodes for 4s orbital of hydrogen atom is :
(A) 0 (B) 4 (C) 3 (D) 2
Ans: C
90. The order of decreasing reactivity towards an electrophilic reagent, for the following would be
(i) benzene (ii) toluene (iii) chlorobenzene (iv) phenol
(a) (ii) > (iv) > (i) > (iii)
(b) (iv) > (iii) > (ii) > (i)
(c) (iv) > (ii) > (i) > (iii)
(d) (i) > (ii) > (iii) > (iv)
Ans: C
91.The volume of oxygen evolved at STP, by decomposition of 0.68 g ‘20 volume’ hydrogenperoxide solution, is
A)2.24 mL
B)22.4 mL
C)224 mL
D)2240 mL
Ans: C
92.Alkaline hydrolysis of which among the following compounds leads to the formation of aracemate ?
A)1-Bromo-1-phenylethane
B)1-Chloro-3-methylbutane
C)Bromoethane
D)1-Chloropropane
Ans: A
93.Which among the following group 16 elements exists in more than two allotropic states ?
A)Polonium
B)Tellurium
C)Selenium
D)Oxygen
Ans: C
94.Solubility of which among the following substances in water increases slightly with rise in temperature ?
A)Potassium bromide
B)Potassium chloride
C)Potassium nitrate
D)Sodium nitrate
Ans: B
95. Assuming enthalpy of combustion of hydrogen at 273 K, –286 kJ and enthalpy of fusion of ice at the same temperature to be + 6.0 kJ, calculate enthalpy change during formation of 100 g of ice
A)+ 1622 kJ
B)– 1622 kJ
C)+292 kJ
D)–292 kJ
Ans: B
96.The product of molar concentrations of hydrogen ions and hydroxide ions in a 0.01 M aqueous solution of sodium chloride is known as
A)Hydrolysis constant of salt
B)Dissociation constant of acid
C)Dissociation constant of base
D)Ionic product of water
Ans: D
97.Which among the following solids crystalises as a face centred cube ?
A)Iron
B)Rubidium
C)Uranium
D)Platinum
Ans: D
98. What is the pH of millimolar solution of ammonium hydroxide which is 20% dissociated ?
A)3.699
B)10.301
C)4.691
D)9.301
Ans: B
99.What is the geometry of molecule of bromine penta fluoride ?
A)square planar
B)trigonal bipyramidal
C)square pyramidal
D)octahedral
Ans: C
100. Which among the following metals is employed to provide cathodic protection to iron ?
A)Zinc
B)Nickel
C)Tin
D)Lead
Ans: A
A)2.24 mL
B)22.4 mL
C)224 mL
D)2240 mL
Ans: C
92.Alkaline hydrolysis of which among the following compounds leads to the formation of aracemate ?
A)1-Bromo-1-phenylethane
B)1-Chloro-3-methylbutane
C)Bromoethane
D)1-Chloropropane
Ans: A
93.Which among the following group 16 elements exists in more than two allotropic states ?
A)Polonium
B)Tellurium
C)Selenium
D)Oxygen
Ans: C
94.Solubility of which among the following substances in water increases slightly with rise in temperature ?
A)Potassium bromide
B)Potassium chloride
C)Potassium nitrate
D)Sodium nitrate
Ans: B
95. Assuming enthalpy of combustion of hydrogen at 273 K, –286 kJ and enthalpy of fusion of ice at the same temperature to be + 6.0 kJ, calculate enthalpy change during formation of 100 g of ice
A)+ 1622 kJ
B)– 1622 kJ
C)+292 kJ
D)–292 kJ
Ans: B
96.The product of molar concentrations of hydrogen ions and hydroxide ions in a 0.01 M aqueous solution of sodium chloride is known as
A)Hydrolysis constant of salt
B)Dissociation constant of acid
C)Dissociation constant of base
D)Ionic product of water
Ans: D
97.Which among the following solids crystalises as a face centred cube ?
A)Iron
B)Rubidium
C)Uranium
D)Platinum
Ans: D
98. What is the pH of millimolar solution of ammonium hydroxide which is 20% dissociated ?
A)3.699
B)10.301
C)4.691
D)9.301
Ans: B
99.What is the geometry of molecule of bromine penta fluoride ?
A)square planar
B)trigonal bipyramidal
C)square pyramidal
D)octahedral
Ans: C
100. Which among the following metals is employed to provide cathodic protection to iron ?
A)Zinc
B)Nickel
C)Tin
D)Lead
Ans: A