CHEMISTRY- PAGE 4
1. Which of the following is a Lewis base :
1) Sulphur dioxide
2) Sulphur trioxide
3) Carbon monoxide
4) Carbon dioxide
Ans: 3
2. Which combination is most stable ?
1) NaI
2) KI
3) RbI
4) CsI
Ans: 4
3. The set of elements having 5 electrons in their outer d-orbitals is :
1) Cr , Mn , Tc
2) Fe , Mo, Re
3) Cr, Mn , Mo
4) Mn , Nb, W
Ans: 3
4. Number of methyl groups present in a molecule of 2,2,7-trimethyl oct-6-en-4-yn-3-ol , are :
1) 3
2) 4
3) 5
4) 6
Ans: 3
5. What is not correct about electromeric effect out of the following ?
1) Presence of multiple bond is essential .
2) Outer attacking reagent is required.
3) it is a permanent effect.
4) Presence of multiple bond is must
Ans: 3
6. Most strong acid out of the following is :
1) o nitrobenzoic acid
2) m aminobenzoic acid
3) p nitrobenzoic acid
4) p methoxybenzoic acid
Ans: 1
7. What is not true for hyperconjugation ?
1) It is also known as nobond resonance.
2) It involves overlapping of orbitals
3) It gives stablity to the molecule
4) It is a pseudo type of effect.
Ans: 4
8. Which of the following has highest boiling point ?
1) n-pentane
2) diethyl ether
3) n-butyraldehyde
4) n-butyl alcohol
Ans: 4
9. Which of the following compound has lowest boiling point ?
1) o-cresol
2) p-cresol
3) m-bromophenol
4) p-bromophenol
Ans: 1
10. The ratio of carbon atoms in napthalene , anthracene and diphenyl molecules is :
1) 4 : 5 : 6
2) 5 : 7 : 6
3) 6 : 7 : 5
4) 4 : 6 : 5
Ans: 2
11. Which of the following compund is not aromatic according to Huckel 4n+2 rule ?
1) Pyridine
2) Anthracene
3) Pyrrole
4) Cycloheptatriene
Ans: 4
12. Which of the following bonds possesses highest value of bond energy :
1) CF
2) CCl
3) CBr
4) CN
Ans: 1
13. Following compound exhibits intramolecular hydrogen bonding :
1) Chloroform
2) Chloral
3) Chloral hydrate
4) p-chlorophenol
Ans: 3
14. Wittig reaction is used for the preparation of :
1) Alkanes
2) Alkenes
3) Alkynes
4) Aldehydes
Ans: 2
15. In Baeyer-Villiger oxidation following conversion takes place :
1) aldehyde to acid
2) ketone to acid
3) ketone to ester
4) Alcohol to ketone
Ans: 3
16. Ratio of hydrogen , carbon and nitrogen atoms in a molecule of pyrrole is :
1) 5 : 4 : 1
2) 2 : 3 : 4
3) 4 : 5 : 1
4) 2 : 4 : 5
Ans: 1
17. The formation of cyanohydrin from ketone is an example of :
1) electrophilic addition
2) nucleophilic addition
3) nucleophilic substitution
4) electrophilic substitution
Ans: 2
18. Formaldehyde undergoes Cannizzaro reaction in presence of concentrated NaOH solution to form :
1) Methanol only
2) methanoic acid only
3) Ethanol and sodium formate
4) methanol and sodium formate
Ans: 4
19. Benzaldehyde reacts with acetic anhydride in presence of sodium acetate to form 3-phenylpropenoic acid. This is an example of :
1) Wittig Reaction
2) Crossed Aldol Condensation
3) Perkin Condensation
4) Claisen Condensation
Ans: 3
20. Alizarin belongs to :
1) Phthalocyanine dyes
2) Anthraquinoid dyes
3) Indigoid dyes
4) Azine dyes
Ans: 2
21. When chlorine is passed into a cold solution of anthracene in carbondisulphide, following is obtained :
1) phenanthrene
2) anthracene monochloride
3) anthracene trichloride
4) anthracene dichloride
Ans: 4
22. Furan undergoes the Gattermann reaction to give :
1) Furoic acid
2) Furfural
3) acyl furan
4) tetrahydrofuran
Ans: 2
23. Which of the following does not undergo Diels-Alder reaction :
1) 1,3 butadiene
2) Cyclopentadiene
3) Furan
4) Thiophene
Ans: 4
24. When mixture of acetylene and hydrogen cyanide is passed through a red hot tube, the product is :
1) pyrrole
2) vinyl cyanide
3) pyridine
4) acraldehyde
Ans: 3
25. Pyridine when heated with excess of sodamide in toluene solution , it forms :
1) 2-amidopyridine
2) 4-amidopyridine
3) 2,4-diaminopyridine
4) 2,6-diaminopyridine
Ans: 4
1) Sulphur dioxide
2) Sulphur trioxide
3) Carbon monoxide
4) Carbon dioxide
Ans: 3
2. Which combination is most stable ?
1) NaI
2) KI
3) RbI
4) CsI
Ans: 4
3. The set of elements having 5 electrons in their outer d-orbitals is :
1) Cr , Mn , Tc
2) Fe , Mo, Re
3) Cr, Mn , Mo
4) Mn , Nb, W
Ans: 3
4. Number of methyl groups present in a molecule of 2,2,7-trimethyl oct-6-en-4-yn-3-ol , are :
1) 3
2) 4
3) 5
4) 6
Ans: 3
5. What is not correct about electromeric effect out of the following ?
1) Presence of multiple bond is essential .
2) Outer attacking reagent is required.
3) it is a permanent effect.
4) Presence of multiple bond is must
Ans: 3
6. Most strong acid out of the following is :
1) o nitrobenzoic acid
2) m aminobenzoic acid
3) p nitrobenzoic acid
4) p methoxybenzoic acid
Ans: 1
7. What is not true for hyperconjugation ?
1) It is also known as nobond resonance.
2) It involves overlapping of orbitals
3) It gives stablity to the molecule
4) It is a pseudo type of effect.
Ans: 4
8. Which of the following has highest boiling point ?
1) n-pentane
2) diethyl ether
3) n-butyraldehyde
4) n-butyl alcohol
Ans: 4
9. Which of the following compound has lowest boiling point ?
1) o-cresol
2) p-cresol
3) m-bromophenol
4) p-bromophenol
Ans: 1
10. The ratio of carbon atoms in napthalene , anthracene and diphenyl molecules is :
1) 4 : 5 : 6
2) 5 : 7 : 6
3) 6 : 7 : 5
4) 4 : 6 : 5
Ans: 2
11. Which of the following compund is not aromatic according to Huckel 4n+2 rule ?
1) Pyridine
2) Anthracene
3) Pyrrole
4) Cycloheptatriene
Ans: 4
12. Which of the following bonds possesses highest value of bond energy :
1) CF
2) CCl
3) CBr
4) CN
Ans: 1
13. Following compound exhibits intramolecular hydrogen bonding :
1) Chloroform
2) Chloral
3) Chloral hydrate
4) p-chlorophenol
Ans: 3
14. Wittig reaction is used for the preparation of :
1) Alkanes
2) Alkenes
3) Alkynes
4) Aldehydes
Ans: 2
15. In Baeyer-Villiger oxidation following conversion takes place :
1) aldehyde to acid
2) ketone to acid
3) ketone to ester
4) Alcohol to ketone
Ans: 3
16. Ratio of hydrogen , carbon and nitrogen atoms in a molecule of pyrrole is :
1) 5 : 4 : 1
2) 2 : 3 : 4
3) 4 : 5 : 1
4) 2 : 4 : 5
Ans: 1
17. The formation of cyanohydrin from ketone is an example of :
1) electrophilic addition
2) nucleophilic addition
3) nucleophilic substitution
4) electrophilic substitution
Ans: 2
18. Formaldehyde undergoes Cannizzaro reaction in presence of concentrated NaOH solution to form :
1) Methanol only
2) methanoic acid only
3) Ethanol and sodium formate
4) methanol and sodium formate
Ans: 4
19. Benzaldehyde reacts with acetic anhydride in presence of sodium acetate to form 3-phenylpropenoic acid. This is an example of :
1) Wittig Reaction
2) Crossed Aldol Condensation
3) Perkin Condensation
4) Claisen Condensation
Ans: 3
20. Alizarin belongs to :
1) Phthalocyanine dyes
2) Anthraquinoid dyes
3) Indigoid dyes
4) Azine dyes
Ans: 2
21. When chlorine is passed into a cold solution of anthracene in carbondisulphide, following is obtained :
1) phenanthrene
2) anthracene monochloride
3) anthracene trichloride
4) anthracene dichloride
Ans: 4
22. Furan undergoes the Gattermann reaction to give :
1) Furoic acid
2) Furfural
3) acyl furan
4) tetrahydrofuran
Ans: 2
23. Which of the following does not undergo Diels-Alder reaction :
1) 1,3 butadiene
2) Cyclopentadiene
3) Furan
4) Thiophene
Ans: 4
24. When mixture of acetylene and hydrogen cyanide is passed through a red hot tube, the product is :
1) pyrrole
2) vinyl cyanide
3) pyridine
4) acraldehyde
Ans: 3
25. Pyridine when heated with excess of sodamide in toluene solution , it forms :
1) 2-amidopyridine
2) 4-amidopyridine
3) 2,4-diaminopyridine
4) 2,6-diaminopyridine
Ans: 4
26:-Intersystem crossing is essential for
A:-Phosphorescence
B:-Fluorescence
C:-Photosensitisation
D:-Chemiluminescence
Ans: A
27:-The lowest lattice energy among the following crystals is
A:-NaCl
B:-KCl
C:-RbCl
D:-CsCl
Ans: D
28:-Improper rotation axis contains
A:-Reflection and refraction
B:-Rotation and reflection
C:-Inversion and refraction
D:-Center of symmetry and rotation
Ans: B
29:-Which among the following state functions is an extensive property of the system ?
A:-Temperature
B:-Volume
C:-Viscosity
D:-Refractive index
Ans: B
30:-The splitting of spectral lines in an electric field is called
A:-Zeeman effect
B:-Photoelectric effect
C:-Stark effect
D:-Thomson effect
Ans: C
A:-Phosphorescence
B:-Fluorescence
C:-Photosensitisation
D:-Chemiluminescence
Ans: A
27:-The lowest lattice energy among the following crystals is
A:-NaCl
B:-KCl
C:-RbCl
D:-CsCl
Ans: D
28:-Improper rotation axis contains
A:-Reflection and refraction
B:-Rotation and reflection
C:-Inversion and refraction
D:-Center of symmetry and rotation
Ans: B
29:-Which among the following state functions is an extensive property of the system ?
A:-Temperature
B:-Volume
C:-Viscosity
D:-Refractive index
Ans: B
30:-The splitting of spectral lines in an electric field is called
A:-Zeeman effect
B:-Photoelectric effect
C:-Stark effect
D:-Thomson effect
Ans: C
31:-A gas can be liquefied by,
A:-High temperature and high pressure
B:-Low temperature and low pressure
C:-Low temperature and high pressure
D:-High temperature and low pressure
Ans: C
32:-At constant pressure, the volume of a fixed mass of gas is directly proportional to its temperature in Kelvin scale. This is known as,
A:-Boyle's law
B:-Charles' law
C:-Avogadro's law
D:-Hentry's law
Ans: B
33:-36g of water contains
A:-2x6.023x10²³ molecules
B:-6.023x10²³ molecules
C:-6.023x10²² molecules
D:-2x6.023x10²² molecules
Ans: A
34:-Maximum number that can be accommodated in p subshell is,
A:-2
B:-6
C:-14
D:-10
Ans: B
35:-The metal with maximum electropositivity is,
A:-K
B:-Na
C:-Fe
D:-Cs
Ans: D
36:-An important ore of aluminium is,
A:-Dolomite
B:-Haematite
C:-Bauxite
D:-Carnalite
Ans: C
37:-Maximum close packing can be seen in,
A:-Graphite
B:-Diamond
C:-Glass
D:-Liquids
Ans: B
38:-Value of absolute zero is,
A:--273°C
B:-273°C
C:-0°C
D:-273K
Ans: A
39:-The minimum energy required to remove the most loosely bound electron from an isolated gaseous atom is called its,
A:-Electronegativity
B:-Electropositivity
C:-Ionisation energy
D:-Electron gain enthalpy
Ans: C
40:-Maximum number of electrons that can be accommodated in a shell is,
A:-2n²
B:-n²
C:-2n
D:-n
Ans: A
A:-High temperature and high pressure
B:-Low temperature and low pressure
C:-Low temperature and high pressure
D:-High temperature and low pressure
Ans: C
32:-At constant pressure, the volume of a fixed mass of gas is directly proportional to its temperature in Kelvin scale. This is known as,
A:-Boyle's law
B:-Charles' law
C:-Avogadro's law
D:-Hentry's law
Ans: B
33:-36g of water contains
A:-2x6.023x10²³ molecules
B:-6.023x10²³ molecules
C:-6.023x10²² molecules
D:-2x6.023x10²² molecules
Ans: A
34:-Maximum number that can be accommodated in p subshell is,
A:-2
B:-6
C:-14
D:-10
Ans: B
35:-The metal with maximum electropositivity is,
A:-K
B:-Na
C:-Fe
D:-Cs
Ans: D
36:-An important ore of aluminium is,
A:-Dolomite
B:-Haematite
C:-Bauxite
D:-Carnalite
Ans: C
37:-Maximum close packing can be seen in,
A:-Graphite
B:-Diamond
C:-Glass
D:-Liquids
Ans: B
38:-Value of absolute zero is,
A:--273°C
B:-273°C
C:-0°C
D:-273K
Ans: A
39:-The minimum energy required to remove the most loosely bound electron from an isolated gaseous atom is called its,
A:-Electronegativity
B:-Electropositivity
C:-Ionisation energy
D:-Electron gain enthalpy
Ans: C
40:-Maximum number of electrons that can be accommodated in a shell is,
A:-2n²
B:-n²
C:-2n
D:-n
Ans: A
41. Which compound is known as inorganic benzene ?
(A) borax (B) diborane (C) borazine (D) boric acid
Ans: C
42. The designation of an orbital with n=4 and l=2 is :
(A) 4d (B) 4s (C) 4p (D) 4f
Ans: A
43. The element with highest electronegativity is :
(A) chlorine (B) bromine (C) iodine (D) fluorine
Ans: D
44. Which of the following is not an antibiotic ?
(A) tetracycline (B) ranitidine (C) ofloxacin (D) penicillin
Ans: B
45. Rosenmund’s reduction of an acid chloride gives :
(A) an ester (B) an alcohol (C) an aldehyde (D) a hydrocarbon
Ans: C
(A) borax (B) diborane (C) borazine (D) boric acid
Ans: C
42. The designation of an orbital with n=4 and l=2 is :
(A) 4d (B) 4s (C) 4p (D) 4f
Ans: A
43. The element with highest electronegativity is :
(A) chlorine (B) bromine (C) iodine (D) fluorine
Ans: D
44. Which of the following is not an antibiotic ?
(A) tetracycline (B) ranitidine (C) ofloxacin (D) penicillin
Ans: B
45. Rosenmund’s reduction of an acid chloride gives :
(A) an ester (B) an alcohol (C) an aldehyde (D) a hydrocarbon
Ans: C
46. If a gas expands at constant temperature, it indicates that
(1) Number of the molecules of gas increases
(2) Kinetic energy of molecules decreases
(3) Pressure of the gas increases
(4) Kinetic energy of molecules remains the same
Ans: 4
47. Kohlrausch's law states that at
(1) Infinite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte
(2) Finite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte
(3) Infinite dilution each ion makes definite contribution to equivalent conductance of an electrolyte depending on the nature of the other ion of the electrolyte
(4) Infinite dilution, each ion makes definite contribution to conductance of an electrolyte whatever be the nature of the other ion of the electrolyte
Ans: 1
48. Which of the following are not state functions?
(I) q + w (II) q
(III) w (IV) H-TS
(1) (II) and (III)
(2) (I) and (IV)
(3) (II), (III) and (IV)
(4) (I), (II) and (III)
Ans: 1
49. What volume of oxygen gas (O2) measured at 0°C and 1 atm, is needed to burn completely 1 L of propane gas (C3H8) measured under the same conditions?
(1) 10 L
(2) 7 L
(3) 6 L
(4) 5 L
Ans: 4
50. Which of the following statements is not correct?
(1) The number of Bravais lattices in which a crystal can be categorized is 14
(2) The fraction of the total volume occupied by the atoms in a primitive cell is 0.48
(3) Molecular solids are generally volatile
(4) The number of carbon atoms in an unit cell of diamond is 4
Ans: 4
(1) Number of the molecules of gas increases
(2) Kinetic energy of molecules decreases
(3) Pressure of the gas increases
(4) Kinetic energy of molecules remains the same
Ans: 4
47. Kohlrausch's law states that at
(1) Infinite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte
(2) Finite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte
(3) Infinite dilution each ion makes definite contribution to equivalent conductance of an electrolyte depending on the nature of the other ion of the electrolyte
(4) Infinite dilution, each ion makes definite contribution to conductance of an electrolyte whatever be the nature of the other ion of the electrolyte
Ans: 1
48. Which of the following are not state functions?
(I) q + w (II) q
(III) w (IV) H-TS
(1) (II) and (III)
(2) (I) and (IV)
(3) (II), (III) and (IV)
(4) (I), (II) and (III)
Ans: 1
49. What volume of oxygen gas (O2) measured at 0°C and 1 atm, is needed to burn completely 1 L of propane gas (C3H8) measured under the same conditions?
(1) 10 L
(2) 7 L
(3) 6 L
(4) 5 L
Ans: 4
50. Which of the following statements is not correct?
(1) The number of Bravais lattices in which a crystal can be categorized is 14
(2) The fraction of the total volume occupied by the atoms in a primitive cell is 0.48
(3) Molecular solids are generally volatile
(4) The number of carbon atoms in an unit cell of diamond is 4
Ans: 4
51. The sequence of ionic mobility in aqueous solution is
(1) Na+ > K+ > Rb+ > Cs+
(2) K+ > Na+ > Rb+ > Cs+
(3) Cs+ > Rb+ > K+ > Na+
(4) Rb+ > K+ > Cs+ > Na+
Ans: 3
52. Percentage of free space in a body centred cubic unit cell is
(1) 28% (2) 30% (3) 32% (4) 34%
Ans: 3
53. The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr (24) and Mn (25) is
(1) Ti > V > Cr > Mn
(2) Cr > Mn > V > Ti
(3) V > Mn > Cr > Ti
(4) Mn > Cr > Ti > V
Ans: 2
54. How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?
(1) 0.029
(2) 0.044
(3) 0.333
(4) 0.011
Ans: 1
55. Number of moles of MnO4- required to oxidize one mole of ferrous oxalate completely in acidic medium will be
(1) 0.2 moles
(2) 0.6 moles
(3) 0.4 moles
(4) 7.5 moles
Ans: 2
56. The alkali metals from salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?
(1) LiH > NaH > KH > RbH > CsH
(2) CsH > RbH > KH > NaH > LiH
(3) KH > NaH > LiH > CsH > RbH
(4) NaH > LiH > KH > RbH > CsH
Ans: 1
57. Which one of the following arrangements does not give the correct picture of the trends indicated against it?
(1) F2 > Cl2 > Br2 > I2 : Electronegativity
(2) F2 > Cl2 > Br2 > I2 : Oxidizing power
(3) F2 > Cl2 > Br2 > I2 : Electron gain enthalpy
(4) F2 > Cl2 > Br2 > I2 : Bond dissociation energy
Ans: 4
58. With which one of the following elements silicon should be doped so as to give p type of semiconductor?
(1) Boron
(2) Germanium
(3) Arsenic
(4) Selenium
Ans: 1
59. The angular shape of molecule (O3) consists of
(1) 2 sigma and 1 pi bond
(2) 1 sigma and 2 pi bonds
(3) 2 sigma and 2 pi bonds
(4) 1 sigma and 1 pi bond
Ans: 1
60. Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH?
(1) CaCl2
(2) SrCl2
(3) BaCl2
(4) MgCl2
Ans: 3
61. Green chemistry means such reactions which
(1) Study the reactions in plants
(2) Produce colour during reactions
(3) Reduce the use and production of hazardous chemicals
(4) Are related to the depletion of ozone layer
Ans: 3
62. How many stereoisomers does the molecules have? CH3CH = CHCH2CHBrCH3
(1) 2 (2) 4
(3) 6 (4) 8
Ans: 2
63. The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of
(1) Acyl chloride > Ester > Acid anhydride > Amide
(2) Acyl chloride > Acid anhydride > Ester > Amide
(3) Ester > Acyl chloride > Amide > Acid anhydride
(4) Acid anhydride > Amide > Ester > Acyl chloride
Ans: 2
64. In DNA, the complimentary bases are
(1) Uracil and adenine; cytosine and guanine
(2) Adenine and thymine; guanine and cytosine
(3) Adenine and thymine; guanine and uracil
(4) Adenine and guanine; thymine and cytosine
Ans: 2
65. An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be
(1) CH4O
(2) CH3O
(3) CH2O
(4) CHO
Ans: 2
66. Which of the following statements is not true?
(1) Natural rubber is a 1, 4 - polymer of isoprene
(2) In vulcanization, the formation of sulphur bridges between different chains make rubber harder and stronger
(3) Natural rubber has the trans-configuration at every double bond
(4) Buna-S is a copolymer of butadiene and styrene
Ans: 3
67. Which one of the following is an amine hormone?
(1) Progesterone
(2) Thyroxine
(3) Oxypurin
(4) Insulin
Ans: 2
(1) Na+ > K+ > Rb+ > Cs+
(2) K+ > Na+ > Rb+ > Cs+
(3) Cs+ > Rb+ > K+ > Na+
(4) Rb+ > K+ > Cs+ > Na+
Ans: 3
52. Percentage of free space in a body centred cubic unit cell is
(1) 28% (2) 30% (3) 32% (4) 34%
Ans: 3
53. The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr (24) and Mn (25) is
(1) Ti > V > Cr > Mn
(2) Cr > Mn > V > Ti
(3) V > Mn > Cr > Ti
(4) Mn > Cr > Ti > V
Ans: 2
54. How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2 g of HCl?
(1) 0.029
(2) 0.044
(3) 0.333
(4) 0.011
Ans: 1
55. Number of moles of MnO4- required to oxidize one mole of ferrous oxalate completely in acidic medium will be
(1) 0.2 moles
(2) 0.6 moles
(3) 0.4 moles
(4) 7.5 moles
Ans: 2
56. The alkali metals from salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?
(1) LiH > NaH > KH > RbH > CsH
(2) CsH > RbH > KH > NaH > LiH
(3) KH > NaH > LiH > CsH > RbH
(4) NaH > LiH > KH > RbH > CsH
Ans: 1
57. Which one of the following arrangements does not give the correct picture of the trends indicated against it?
(1) F2 > Cl2 > Br2 > I2 : Electronegativity
(2) F2 > Cl2 > Br2 > I2 : Oxidizing power
(3) F2 > Cl2 > Br2 > I2 : Electron gain enthalpy
(4) F2 > Cl2 > Br2 > I2 : Bond dissociation energy
Ans: 4
58. With which one of the following elements silicon should be doped so as to give p type of semiconductor?
(1) Boron
(2) Germanium
(3) Arsenic
(4) Selenium
Ans: 1
59. The angular shape of molecule (O3) consists of
(1) 2 sigma and 1 pi bond
(2) 1 sigma and 2 pi bonds
(3) 2 sigma and 2 pi bonds
(4) 1 sigma and 1 pi bond
Ans: 1
60. Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH?
(1) CaCl2
(2) SrCl2
(3) BaCl2
(4) MgCl2
Ans: 3
61. Green chemistry means such reactions which
(1) Study the reactions in plants
(2) Produce colour during reactions
(3) Reduce the use and production of hazardous chemicals
(4) Are related to the depletion of ozone layer
Ans: 3
62. How many stereoisomers does the molecules have? CH3CH = CHCH2CHBrCH3
(1) 2 (2) 4
(3) 6 (4) 8
Ans: 2
63. The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of
(1) Acyl chloride > Ester > Acid anhydride > Amide
(2) Acyl chloride > Acid anhydride > Ester > Amide
(3) Ester > Acyl chloride > Amide > Acid anhydride
(4) Acid anhydride > Amide > Ester > Acyl chloride
Ans: 2
64. In DNA, the complimentary bases are
(1) Uracil and adenine; cytosine and guanine
(2) Adenine and thymine; guanine and cytosine
(3) Adenine and thymine; guanine and uracil
(4) Adenine and guanine; thymine and cytosine
Ans: 2
65. An organic compound contains carbon, hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be
(1) CH4O
(2) CH3O
(3) CH2O
(4) CHO
Ans: 2
66. Which of the following statements is not true?
(1) Natural rubber is a 1, 4 - polymer of isoprene
(2) In vulcanization, the formation of sulphur bridges between different chains make rubber harder and stronger
(3) Natural rubber has the trans-configuration at every double bond
(4) Buna-S is a copolymer of butadiene and styrene
Ans: 3
67. Which one of the following is an amine hormone?
(1) Progesterone
(2) Thyroxine
(3) Oxypurin
(4) Insulin
Ans: 2
68. Oxidation numbers of P in PO43-, of S in SO42- and that of Cr in Cr2O72-, are respectively :
1) + 3, + 6 and + 5 2) + 5, + 3 and + 6 3) - 3, + 6 and + 6 4) + 5, + 6 and + 6
Ans: 4
69. Lithium metal crystallises in a body centred cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of the lithium will be:
1) 151.8 pm 2) 75.5 pm 3) 300.5 pm 4) 240.8 pm
Ans: 1
70. Which of the following reactions is an example of nucleophilic substitution reaction?
1) 2 RX + 2 Na → R - R + 2 NaX
2) RX + H2 → RH + HX
3) RX + Mg → RMgX
4) RX + KOH → ROH + KX
Ans: 4
71. In the case of alkali metals, the covalent character decreases in the order:
1) MF > MCl > MBr > MI
2) MF > MCl > MI > MBr
3) MI > MBr > MCl > MF
4) MCl > MI > MBr > MF
Ans: 3
72. Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?
1) 3d54s1
2) 3d54s2
3) 3d24s2
4) 3d34s2
Ans: 2
73. The stability of + 1 oxidation state increases in the sequence:
1) Tl < In < Ga < Al
2) In < Tl < Ga < Al
3) Ga < In < Al < Tl
4) Al < Ga < In < Tl
Ans: 4
74. Given: (i) Cu2+ + 2e− → Cu, E° = 0.337 V (ii) Cu2+ + e− → Cu+, E° = 0.153 V Electrode potential, E° for the reaction, Cu+ + e− → Cu, will be:
1) 0.90 V 2) 0.30 V 3) 0.38 V 4) 0.52 V
Ans: 4
75. Value of azimuthal quantum number for 6d orbital will be ________
(A) 1 (B) 0
(C) 2 (D) 3
Ans: C
76. Calculate the number of subshell in the shell with n = 4
(A) 4 (B) 8
(C) 9 (D) 6
Ans: A
77. What is the dominant intermolecular force or bond that must be overcome in converting liquid CH3OH to a gas?
1) Dipole-dipole interaction 2) Covalent bonds 3) London dispersion force 4) Hydrogen bonding
Ans: 4
78. Which of the following oxides is not expected to react with sodium hydroxide?
1) CaO 2) SiO2 3) BeO 4) B2O3
Ans: 1
79. The segment of DNA which acts as the instrumental manual for the synthesis of the protein is:
1) ribose 2) gene 3) nucleoside 4) nucleotide
Ans: 2
80. Maximum number of electrons in a subshell of an atom is determined by the following:
1) 2 l + 1 2) 4 l - 2 3) 2 n2 4) 4 l + 2
Ans: 4
81. Which one of the following is employed as a tranquilizer?
1) Naproxen 2) Tetracycline 3) Chlorpheninamine 4) Equanil
Ans: 4
82. Benzene reacts with CH3Cl in the presence of anhydrous AlCl3 to form:
1) Chlorobenzene 2) Benzylchloride 3) Xylene 4) Toluene
Ans: 4
83. Which of the following is not permissible arrangement of electrons in an atom?
1) n = 5, l = 3, m = 0, s = + 1/2 2) n = 3, l = 2, m = - 3, s = - 1/2 3) n = 3, l = 2, m = -2, s = - 1/2 4) n = 4, l = 0, m = 0, s = - ?
Ans: 2
84. The values of ΔH and ΔS for the reaction, C(graphite) + CO2 (g) → 2CO(g) are 170 kJ and 170 JK−1, respectively. This reaction will be spontaneous at
1) 910 K 2) 1110 K 3) 510 K 4) 710 K
Ans: 2
85. Copper crystallises in a face-centred cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm?
1) 157
2) 181
3) 108
4) 128
Ans: 4
86. According to MO theory which of the following lists ranks the nitrogen species in terms of increasing bond order?
1) N22- < N2- < N2
2) N2 < N22- < N2-
3) N2- < N22- < N2
4) N2- < N2 < N22-
Ans: 1
87. Number of Radial node for 3P hydrogenic orbital (at r = 0) will be ________.
(A) 0 (B) 1 (C) 2 (D) 3
Ans: B
88. The IUPAC name of the compound having the formula CH ≡ C - CH = CH2 is:
1) 1-butyn-3-ene
2) but-1-yne-3-ene
3) 1-butene-3-yne
4) 3-butene-1-yne
Ans: 3
89. Which of the following compounds will exhibit cis-trans (geometrical) isomerism?
1) Butanol
2) 2-Butyne
3) 2-Butenol
4) 2-Butene
Ans: 4
90. What will be the oxidation number of N in Azide ion?
(A) 1
(B) –1
(C) –0.33
(D) +0.33
Ans: C
91. BOD value of ‘clean water’ must be __________.
(A) <5 ppm (B) >17 ppm (C) >5 ppm (D) 5-10 ppm
Ans: A
92. 10 g of hdyrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be:
1) 3 mol
2) 4 mol
3) 1 mol
4) 2 mol
Ans: 2
93. Among the following which is the strongest oxidizing agent?
1) Br2 2) I2 3) Cl2 4) F 2
Ans: 4
94. In which of the following molecules / ions BF 3, NO2-, NH2- and H2O, the central atom is sp2 hybridized?
1) NH2- and H2O
2) NO2- and H2O
3) BF 3 and NO2-
4) NO2- and NH2-
Ans: 3
95. Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO3 and conc. H2SO4 in the mixture, nitric acid acts as a/an: 1) acid
2) base
3) catalyst
4) reducing agent
Ans: 2
96. Which one of the following errors cannot be avoided?
(A) Additive (B) Personal (C) Intermediate (D) Instrumental
Ans: C
97. What is the [OH -] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)2?
1) 0.40 M
2) 0.0050 M
3) 0.12 M
4) 0.10 M
Ans: 4
98. For the reaction A + B → products, it is observed that: (a) on doubling the initial concentration of A only, the rate of reaction is also doubled and (b) on doubling the initial concentrations of both A and B, there is a change by a factor of 8 in the rate of the reaction. The rate of this reaction is given by:
1) rate = k [A] [B]2
2) rate = k [A]2 [B]2
3) rate = k [A] [B]
4) rate = k [A]2 [B]
Ans: 1
99. Which of the following hormones contains iodine?
1) testosterone
2) adrenaline
3) thyroxine
4) insulin
Ans: 3
100. In the case of chemical change what is generally affected
1) Neutron
2) Nucleus
3) Proton
4) Electron
Ans: 4
1) + 3, + 6 and + 5 2) + 5, + 3 and + 6 3) - 3, + 6 and + 6 4) + 5, + 6 and + 6
Ans: 4
69. Lithium metal crystallises in a body centred cubic crystal. If the length of the side of the unit cell of lithium is 351 pm, the atomic radius of the lithium will be:
1) 151.8 pm 2) 75.5 pm 3) 300.5 pm 4) 240.8 pm
Ans: 1
70. Which of the following reactions is an example of nucleophilic substitution reaction?
1) 2 RX + 2 Na → R - R + 2 NaX
2) RX + H2 → RH + HX
3) RX + Mg → RMgX
4) RX + KOH → ROH + KX
Ans: 4
71. In the case of alkali metals, the covalent character decreases in the order:
1) MF > MCl > MBr > MI
2) MF > MCl > MI > MBr
3) MI > MBr > MCl > MF
4) MCl > MI > MBr > MF
Ans: 3
72. Which one of the elements with the following outer orbital configurations may exhibit the largest number of oxidation states?
1) 3d54s1
2) 3d54s2
3) 3d24s2
4) 3d34s2
Ans: 2
73. The stability of + 1 oxidation state increases in the sequence:
1) Tl < In < Ga < Al
2) In < Tl < Ga < Al
3) Ga < In < Al < Tl
4) Al < Ga < In < Tl
Ans: 4
74. Given: (i) Cu2+ + 2e− → Cu, E° = 0.337 V (ii) Cu2+ + e− → Cu+, E° = 0.153 V Electrode potential, E° for the reaction, Cu+ + e− → Cu, will be:
1) 0.90 V 2) 0.30 V 3) 0.38 V 4) 0.52 V
Ans: 4
75. Value of azimuthal quantum number for 6d orbital will be ________
(A) 1 (B) 0
(C) 2 (D) 3
Ans: C
76. Calculate the number of subshell in the shell with n = 4
(A) 4 (B) 8
(C) 9 (D) 6
Ans: A
77. What is the dominant intermolecular force or bond that must be overcome in converting liquid CH3OH to a gas?
1) Dipole-dipole interaction 2) Covalent bonds 3) London dispersion force 4) Hydrogen bonding
Ans: 4
78. Which of the following oxides is not expected to react with sodium hydroxide?
1) CaO 2) SiO2 3) BeO 4) B2O3
Ans: 1
79. The segment of DNA which acts as the instrumental manual for the synthesis of the protein is:
1) ribose 2) gene 3) nucleoside 4) nucleotide
Ans: 2
80. Maximum number of electrons in a subshell of an atom is determined by the following:
1) 2 l + 1 2) 4 l - 2 3) 2 n2 4) 4 l + 2
Ans: 4
81. Which one of the following is employed as a tranquilizer?
1) Naproxen 2) Tetracycline 3) Chlorpheninamine 4) Equanil
Ans: 4
82. Benzene reacts with CH3Cl in the presence of anhydrous AlCl3 to form:
1) Chlorobenzene 2) Benzylchloride 3) Xylene 4) Toluene
Ans: 4
83. Which of the following is not permissible arrangement of electrons in an atom?
1) n = 5, l = 3, m = 0, s = + 1/2 2) n = 3, l = 2, m = - 3, s = - 1/2 3) n = 3, l = 2, m = -2, s = - 1/2 4) n = 4, l = 0, m = 0, s = - ?
Ans: 2
84. The values of ΔH and ΔS for the reaction, C(graphite) + CO2 (g) → 2CO(g) are 170 kJ and 170 JK−1, respectively. This reaction will be spontaneous at
1) 910 K 2) 1110 K 3) 510 K 4) 710 K
Ans: 2
85. Copper crystallises in a face-centred cubic lattice with a unit cell length of 361 pm. What is the radius of copper atom in pm?
1) 157
2) 181
3) 108
4) 128
Ans: 4
86. According to MO theory which of the following lists ranks the nitrogen species in terms of increasing bond order?
1) N22- < N2- < N2
2) N2 < N22- < N2-
3) N2- < N22- < N2
4) N2- < N2 < N22-
Ans: 1
87. Number of Radial node for 3P hydrogenic orbital (at r = 0) will be ________.
(A) 0 (B) 1 (C) 2 (D) 3
Ans: B
88. The IUPAC name of the compound having the formula CH ≡ C - CH = CH2 is:
1) 1-butyn-3-ene
2) but-1-yne-3-ene
3) 1-butene-3-yne
4) 3-butene-1-yne
Ans: 3
89. Which of the following compounds will exhibit cis-trans (geometrical) isomerism?
1) Butanol
2) 2-Butyne
3) 2-Butenol
4) 2-Butene
Ans: 4
90. What will be the oxidation number of N in Azide ion?
(A) 1
(B) –1
(C) –0.33
(D) +0.33
Ans: C
91. BOD value of ‘clean water’ must be __________.
(A) <5 ppm (B) >17 ppm (C) >5 ppm (D) 5-10 ppm
Ans: A
92. 10 g of hdyrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be:
1) 3 mol
2) 4 mol
3) 1 mol
4) 2 mol
Ans: 2
93. Among the following which is the strongest oxidizing agent?
1) Br2 2) I2 3) Cl2 4) F 2
Ans: 4
94. In which of the following molecules / ions BF 3, NO2-, NH2- and H2O, the central atom is sp2 hybridized?
1) NH2- and H2O
2) NO2- and H2O
3) BF 3 and NO2-
4) NO2- and NH2-
Ans: 3
95. Nitrobenzene can be prepared from benzene by using a mixture of conc. HNO3 and conc. H2SO4 in the mixture, nitric acid acts as a/an: 1) acid
2) base
3) catalyst
4) reducing agent
Ans: 2
96. Which one of the following errors cannot be avoided?
(A) Additive (B) Personal (C) Intermediate (D) Instrumental
Ans: C
97. What is the [OH -] in the final solution prepared by mixing 20.0 mL of 0.050 M HCl with 30.0 mL of 0.10 M Ba(OH)2?
1) 0.40 M
2) 0.0050 M
3) 0.12 M
4) 0.10 M
Ans: 4
98. For the reaction A + B → products, it is observed that: (a) on doubling the initial concentration of A only, the rate of reaction is also doubled and (b) on doubling the initial concentrations of both A and B, there is a change by a factor of 8 in the rate of the reaction. The rate of this reaction is given by:
1) rate = k [A] [B]2
2) rate = k [A]2 [B]2
3) rate = k [A] [B]
4) rate = k [A]2 [B]
Ans: 1
99. Which of the following hormones contains iodine?
1) testosterone
2) adrenaline
3) thyroxine
4) insulin
Ans: 3
100. In the case of chemical change what is generally affected
1) Neutron
2) Nucleus
3) Proton
4) Electron
Ans: 4