Aromaticity MCQ Questions for CSIR NET, GATE, IIT JAM - Assignment 4

This is fourth assignement for Aromaticity. It contains various MCQ questions on the topic. These questions are meant for various exams

GOC Assignment-2

Questions

Q1 Which of the following is not correct?

a) NEt₃ > NHEt₂ > NH₂Et > NH₃ (basicity in gaseous state)

b)  

c) NH₄⁺ < C₆H₅OH < NH₃ (pka order)

d)  

Q2 The correct order of basicity among the following is:

Q3 The correct statement about the following compound is:

a) If X = NH, aromatic; if X = O, non-aromatic

b) If X = O, aromatic; if X = NH, non-aromatic

c) If X = NH, aromatic; if X = O, aromatic

d) If X = O, anti-aromatic; if X = NH, aromatic

Q4 Correct order of stability of following carbocations is:

a) B > A > C > D > E

b) A > B > C > D > E

c) C > A > B > E > D

d) A > C > B > E > D

Q5 Which of the following π-π interactions is/are possible?

a) Only A

b) B and C

c) A and B

d) A, B, C

 

Q6 The least stable carbanion among the following is:

a) II

b) I

c) IV

d) III

Q7 The total number of sp3 hybridised species among the following are:

a) 0

b) 1

c) 2

d) 3

Q8 Which of the following will undergo aromatic substitution reactions?

a) Only (I)

b) I, II, III

c) Only III

d) II, III

Q9 Match the following:

a) P-IV, Q-II, R-I, S-III

b) P-I, Q-III, R-II, S-IV

c) P-II, Q-IV, R-I, S-III

d) P-II, Q-III, R-I, S-IV

Q10 The correct order of heat of hydrogenation of following compounds:

a) D > A > B > C

b) C > B > A > D

c) C > D > B > A

d) D > B > A > C

Q11 Which of the following statements is not correct about the given compound?

a) The stretching frequency of bond b is greater than bond c.

b) The stretching frequency of bond c is greater than bond a.

c) The bond length of a is smaller than bond c.

d) The bond length of b is smaller than bond c.

 

Q12 Which of the following will not lead to the formation of carbon-di-oxide gas upon treatment with sodium bicarbonate?

Q13 Arrange the following in order of deactivation of ring towards electrophile:

a) A > B > C > D

b) D > C > B > A

c) A > C > B > D

d) D > B > C > A

Q14 Which of the following will be insoluble in aqueous acids?

 

Q15 The correct order of rate of decarboxylation among the following is:

Answer Key

1-b, 2-c, 3-a, 4-b, 5-d, 6-c, 7-d, 8-b, 9-c, 10-a, 11-b, 12-c, 13-b, 14-a, 15-d