GENERAL ORGANIC CHEMISTRY 60 Questions

GENERAL ORGANIC CHEMISTRY
BY PARTH GOYAL
1. Which one of the following is ethyl-4-(dimethyl amino) butanoate ?
2. Identify the correct IUPAC name of the compound given below
3. IUPAC name of (CH3)3 CCl is
(a) 1-butyl chloride
(b) 3-chloro butane
(c) 2-chloro-2-methylpropane
(d) 2-butyl chloride
4. Which of the following is a 3-methylbutyl group?
(a) CH3CH2CH2CH2CH2–
(b) (CH3CH2)2CH–
(c) (CH3)3CCH2–
(d) (CH3)2CHCH2CH2–
5. The IUPAC name for
6. What is the IUPAC name of the following compound ?
7. Total number of structural isomers possible for C3H6 are :
(a) 2
(b) 1
(c) 4
(d) 3
8. CH3CH2OH and CH3OCH3 are the examples of
(a) chain isomerism
(b) functional isomerism
(c) position isomerism
(d) metamerism
9. Which organic structure among the following is not an
isomer of the compound CH3–CO–CH2CH2CH2CH3 ?
(a) CH3CH2OCH =CHCH2CH3
(b) CH3CH = CHCH2CH2CHO
(c) (CH3)2CH–CO–CH2CH3
(d) CH3CH2COCH2CH2CH3
10. The least number of carbon atoms in alkane showing
isomerism is
(a) 3
(b) 1
(c) 2
(d) 4
11. The total number of isomers for C4H8 is
(a) 5
(b) 6
(c) 7
(d) 8
12. Which of the following compounds is isomeric with 2, 2, 4,
4- tetramethylhexane?
(a) 3-ethyl -2, 2- dimethylpentane
(b) 4-isopropylheptane
(c) 4-ethyl-3-methyl-4-n propyloctane
(d) 4, 4-diethyl-3-methylheptane
13. Which are isomers ?
(a) ethyl alcohol and dimethyl ether
(b) acetone and acetaldehyde
(c) propionic acid and propanone
(d) methyl alcohol and dimethyl ether
14.
15. Heterolytic fission of a covalent bond in organic
molecules gives
(a) free radicals
(b) cations and anions
(c) only cations
(d) only anions
16. Which of the following statements is not correct ?
(a) Carbocation posses sextet of electrons.
(b) The order of carbocation stability is :
(c) Carbocations have trigonal planar shape

(d) Carbocations are formed by heterolytic cleavage
17. Heterolytic fission of C – Br bond results in the
formation of
(a) free radical
(b) carbanion
(c) carbocation
(d) Both (b) and (c)
18. Which of the following carbocations is least stable?
(a) tert-Alkyl
(b) sec-Alkyl
(c) pri-Alkyl
(d) Methyl
19. Which of the following ions is most stable ?
20.
21.
22. The organic reaction which proceed through
heterolytic bond cleavage are called ________
(a) ionic
(b) polar
(c) nonpolar
(d) Both (a) and (b)
23. Among the following, the true property about
24. The homolytic fission of a covalent bond liberates
(a) Carbonium ions
(b) Carbanions
(c) Free radicals
(d) Carbenes
25 . Homolytic fission of C–C bond in ethane gives an
intermediate in which carbon is
(a) sp3-hybridised
(b) sp2-hybridised
(c) sp-hybridised
(d) sp2d-hybridised
26. The increasing order of stability of the following free
radicals is
27. For the reaction of phenol with CHCl3 in
presence of KOH, the electrophile is
28. Which of the following is strongest nucleophile
29. Which of the following is an electrophile ?
(a) Lewis acid
(b) Lewis base
(c) Negatively charged species
(d) None of the above
30. Polarization of electrons in acrolein may be written
as
31. Point out the incorrect statement about resonance?
(a) Resonance structures should have equal energy
(b) In resonating structures, the constituent atoms must be in
the same position
(c) In resonating structures, there should not be same number
of electron pairs
(d) Resonating structures should differ only in the location of
electrons around the constituent atoms
32.
33. In which of the following, resonance will be possible?
34. Which of the following statements regarding the resonance
energy of benzene is correct?
(a) Resonance energy is the energy required to break the C–H
bond in benzene
(b) Resonance energy is the energy required to break the C–C
bond in benzene
(c) Resonance energy is a measure of stability of benzene
(d) Resonance energy is the energy required to convert
35. The polarity is produced in the molecule by the interaction
of two – bonds or between a – bond and lone pair
of electrons present on an adjacent atom.
The above statement is true for which of the following ?
(a) Inductive effect (b) Electromeric effect
(c) Resonance effect (d) Hyperconjugation
36.
37.
38. The state of hybridization of C2, C3, C5 and C6 of the
hydrocarbon,
39.
40. In which of the compounds given below there is more than
one kind of hybridization (sp, sp2, sp3) for carbon ?
(i) CH3CH2CH2CH3 (ii) CH3CH = CHCH3
(iii) CH2=CH–CH=CH2 (iv) H –C 􀁻 C – H
(a) (ii) (b) (iii) and (iv)
(c) (i) and (iv) (d) (ii) and (iii)
41. Which of the following compounds will show metamerism?
(a) CH3–CO–C2H5
(b) C2H5–S–C2H5
(c) CH3–O–CH3
(d) CH3–O–C2H5
42. The compound C4H10O can show
(a) metamerism
(b) functional isomerism
(c) position isomerism
(d) All of these
43. Which pair of isomerism is not possible together?
(a) Ring-chain and functional
(b) Geometrical and optical
(c) Metamerism and functional
(d) Metamerism and chain
44. Which of the following represents the correct order of
stability of the given carbocations ?
45. The most stable carbanion among the following is
46. Which one of the following is a free-radical substitution
reaction?
47. Rate of the reaction
48.
49. Which of the following is least reactive in a nucleophilic
substitution reaction.
50. Which of the following does not represent formation of
reactive intermediate correctly ?
51. The most suitable method for separtion of a 1 : 1 mixture of
ortho and para nitrophenols is
(a) Sublimation
(b) Chromatography
(c) Crystallization
(d) Steam distillation
52. The Lassaigne’s extract is boiled with dil. HNO3 before
testing for halogens because
(a) silver halides are soluble in HNO3
(b) Na2S and NaCN are decomposed by HNO3
(c) Ag2S is soluble in HNO3
(d) AgCN is soluble is HNO3
53. During hearing of a court case, the judge suspected that some
changes in the documents had been carried out. He asked the forensic
department to check the ink used at two different places. According to
you which technique can give the best results?
(a) Column chromatography
(b) Solvent extraction
(c) Distillation
(d) Thin layer chromatography
54. The successive members in a homologues series differ
from each other by ________
(a) – CH2CH2 –unit
(b) – CH2 unit
(c) – OCH3 unit
(d) – CH3 unit
55. Which of the following statements is false for isopentane ?
(a) It has three CH3 groups
(b) It has one CH2 group
(c) It has one CH group
(d) It has a carbon which is not bonded to hydrogen
56. Methoxyethane and propanol are the examples of isomerism
of the type
(a) structural
(b) position
(c) functional
(d) tautomerism
57. In which of the following homolytic bond fission
takes place ?
(a) Alkaline hydrolysis of ethyl chloride
(b) Addition of HBr to double bond
(c) Photochlorination of methane
(d) Nitration of benzene
58. On exciting, Cl2 molecules by UV light, we get
59. Aniline is purified by
(a) steam distillation
(b) simple distillation
(c) vacuum distillation
(d) extraction with a solvent
60. Glycerol can be separated from spent lye in soap
industry by which of the following method ?
(a) Steam distillation
(b) Fractional distillation
(c) Distillation under reduced pressure
(d) Differential extraction
1 d
2 d
3 c
4 d
5 b
6 b
7 a
8 b
9 b
10 d
11 b
12 b
13 a
14 b
15 b
16 b
17 c
18 d
19 a
20 d
21 a
22 d
23 b
24 c
25 b
26 b
27 b
28 c
29 a
30 d
31 c
32 a
33 b
34 c
35 c
36 a
37 b
38 d
39 a
40 a
41 b
42 d
43 c
44 b
45 d
46 b
47 c
48 a
49 b
50 d
51 d
52 b
53 d
54 b
55 d
56 c
57 c
58 a
59 a
60 c

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GENERAL ORGANIC CHEMISTRY

(c) Carbocations have trigonal planar shape

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