GOC Chapterwise MCQsAssignment-1
20 GOC MCQ Questions are given on this page. These questions have been asked in previous year exams of CSIR NET, GATE, TIFR, BARC etc. Test your knowledge by trying these simple MCQs and match your answers with the answer key provided at the bottom of the page.Also note, you can attempt this assignment as a quiz where you can mark options, calculate your score and see which questions you attempted were correct and which were not. For doing so, go to Quiz link. To download the assignment in PDF format, click PDF.
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Quiz PDF
Q1. 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
Q2. 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
Q3. Order of
stability for the following carbocations follows:
a) I
< III < II < IV
b) I
< III < II = IV
c) I
< II = IV < III
d) I
<II = III = IV
Q4. 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
Q5. 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)
Q6. For which of
the following reactions, the equilibrium constant (K) is less than unity?
Q7. Selected
bond angles for six hydrocarbons are shown below. Arrange these hydrocarbons
according to their pKa values, from the lowest to the highest.
a) VI<II<III<IV<V<I
b) V<IV<VI<III<II<I
c) I<II<III<VI<IV<V
d) I<V<IV<III<II<VI
Q8. 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
Q9. 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
Q10. Molecular
orbital interactions involved in the first step of the following reaction is:
a) Î C=C
to σ*C-Cl
b) nb(Cl)
to σ*(Al-Cl)
c) nb(Cl)
to p-orbital (Al)
d) πC=C to π*C=O
Q11. Which of the
following compound is best hydride donor?
Q12. How many of
the following compounds are not aromatic?
a) 1
b) 2
c) 3
d) 4
Q13. In which of
the following pairs, the resonance energy of second compound is higher than the
first?
Q14. Compound
which is least reactive towards LiAlH4:
Q15. 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
Q16. The value
of ‘n’ for the following molecule according to Huckel’s rules is:
a) 7
b) 16
c) 14
d) 3
Q17. 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
Q18. 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
Q19. 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
Q20. Total no.
of anti-aromatic compounds is:
a) 1
b) 2
c) 3
d) 4
Answer Key
Q1.c Q2.c Q3.b Q4.b Q5.a Q6.d Q7.d Q8.b Q9.b Q10.c
Q11.b Q12.b Q13.b Q14.c Q15.b Q16.d Q17.c Q18.c Q19.d Q20.b
Detailed Solution
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