GOC & Aromaticity Test 1 | Chemistry Test Series for CSIR NET & GATE - ChemContent

personVijay Ishwar

November 11, 2022

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CSIR NET & GATE
Test Series

GOC & Aromaticity
Test-1

Attempt as QUIZ

Question 1 The correct statement about the following is a) I and II are resonating structures b) I and II have 4 sp2 atoms c) I and II are different compounds d) I has 4 sp2 atoms and II has 6 sp2 atoms

Question 2 Which of the following is/are stable hydrate (s)? a) III only b) II and III c) I, II and III d) all of these

Question 3 Order of stability for the following carbocations follows: a) b) c) d)

Question 4 The following molecule follows carbocationic mechanism. The decreasing order of the positions for preferential reaction is: a) 2 > 1 > 3 b) 1 > 2 > 3 c) 2 > 3 > 1 d) 1 > 3 > 2

Question 5 Match the following carbanions with their corresponding half-lives a) (A-R), (B-S), (C-Q), (D-P) b) (A-R), (B-Q), (C-S), (D-P) c) (A-S), (B-Q), (C-P), (D-R) d) (A-Q), (B-S), (C-P), (D-R)

Question 6 For which of the following reactions, the equilibrium constant (K) is less than unity? a) b) c) d)

Question 7 Selected bond angles for six hydrocarbons are shown below. Arrange these hydrocarbons according to their pKa values, from the lowest to the highest. a) b) c) d)

Question 8 Which of the following is the correct order of basic nature? a) Q > R > P b) R > Q > P c) R > P > Q d) Q > P > R

Question 9 Arrange the following compounds, in decreasing order of C-N bond length: a) D > C > B > A b) D > C > A > B c) A > B > C > D d) D > A > C > B

Question 10 Molecular orbital interactions involved in the first step of the following reaction is:

Question 11 Which of the following compound is best hydride donor? a) b) c) d)

Question 12 How many of the following compounds are not aromatic? a) 1 b) 2 c) 3 d) 4

Question 13 In which of the following pairs, the resonance energy of second compound is higher than the first? a) b) c) d)

Question 14 Compound which is least reactive towards LiAlH4? a) b) c) d)

Question 15 Which of the following compounds are aromatic? a) I and II b) I, II and IV c) I, II, III, IV d) Only I and IV

Question 16 The value of ‘n’ for the following molecule according to Huckel’s rules is: a) 7 b) 16 c) 14 d) 3

Question 17 Among the following, which is correct? a) Both cyclopentadienyl anion and benzene are aromatic and have the same stability b) Benzene is aromatic and more stable than cyclopentadienyl anion which is anti-aromatic c) Both are aromatic, but benzene is more stable than cyclopentadienyl anion d) Cyclopentadienyl anion is more stable than benzene although both are aromatic

Question 18 Correct order towards Diels-Alder reaction: a) III > II > I > IV b) III > IV > I > II c) III > I > II > IV d) II > I > III > IV

Question 19 Correct order of acidity of the following acids: a) D > A > B > C b) B > D > C > A c) C > A > B > D d) C > B > D > A

Question 20 Total no. of anti-aromatic compounds are: a) 1 b) 2 c) 3 d) 4

Ans Key

1c 2c 3b 4b 5a 6d 7d 8b 9b 10c 11b 12b 13b 14c 15b 16d 17c 18c 19d 20b

Also See

Tags

Aromaticity GOC Test Series

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