ORGANIC CHEMISTRY
Daily Assignment
IIT-JAM
Home Work DPP
Aromaticity (2)
1. Compound which are non aromatic in nature
H
B
(A) (B) (C) (D)
(a) A, B, C, D (b) B, C, D (c) A, B, D (d) Only D
2. Compound which has highest dipole moment
(a) (b) (c) (d)
CHEM ACADEMY
O
3. Which of the following species is/are aromtic in nature?
O O
N N N N
(I) (II) (III) (IV)
N O O
(a) I, II, IV (b) I, II, III (c) II, III, IV (d) I and II only
4. Which of the following compound would exhibit aromatic properties
(a) B H (b) B H (c) N H (d) H N N H
5. Which among the following is a better Diels Alder diene reacting with maleic anhydride?
(a) (b) (c) N (d)
O S N
H
6. Compound which is least reactive towards SN1 reaction is
Cl H2C Cl
Cl
Cl
(a) (b) (c) (d)
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7. Compound which is aromatic?
H
N
(a) (b) O (c) (d)
8. Which of the following is best classified as heterocyclic aromatic compounds?
N
(a) N H (b) N (c) (d)
N
9. Which has maximum dipole moment?
O
O
C
(a) (b) (c) (d)
10. Which of the following resonance structure is not aromatic?
O O
O H H
N N
(a) (b) (c) (d) O N O
B O O
11.
O
CHEM ACADEMY H
Which of the following are converted to an aromatic substance on loss of hydride ion?
H
H H H
H
(I) (II) (III) (IV)
H H H H
(a) I, III (b) I, II, III (c) I, III, IV (d) I, II, IV
12. Which of the following carbonyl compounds form an aromatic cation on protonation?
(I) O (II) O (III) O (IV) O O
(a) I, II (b) I, II, IV (c) I and IV (d) Only IV
13. Amongst the following the aromatic compound(s) is (are)
S
(i) (ii) B (iii) (iv) B
S H H
(a) i, ii, iii, iv (b) iii, iv (c) iv (d) i, iii, iv
14. Which of the following carbanion is most stable?
CN
(a) NC (b) (c) (d)
Head Office: North Delhi: 72, Mall Road, G.T.B. Nagar, New Delhi - 110009
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15. Compound which has the least dipole moment is
(a) (b) (c) (d)
16. Compound which is least reactive toward’s LiAlH4 are
O O
O
O
(a) (b) (c) (d)
O
17. Compounds which are aromatic in nature
(A) (B) (C) (D)
(a) A, B (b) B, D (c) B, C, D (d) A, B, C, D
18. Reactivity of the following compounds towards SN1 follow the order
(I)
Cl
CHEM ACADEMY Cl
(II)
Cl
(III)
Cl
(IV)
O
(a) I > IV > II > III (b) I > II > III > IV (c) I > III > II > IV (d) IV > I > II > III
ANSWER KEY
1. d 2. a 3. b 4. b 5. a 6. b 7. b
8. d 9. c 10. b 11. a 12. c 13. c 14. a
15. c 16. b 17. c 18. b
Head Office: North Delhi: 72, Mall Road, G.T.B. Nagar, New Delhi - 110009
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Toll Free: 1800 120 5848, Ph.: 011-41415514, 09136597244, Web.: www.chemacademy.co.in
