Isomerism MCQ Questions & Answers in Organic Chemistry | Chemistry
Learn Isomerism MCQ questions & answers in Organic Chemistry are available for students perparing for IIT-JEE, NEET, Engineering and Medical Enternace exam.
51.
Tautomerism is exhibited by –
A
B
C
D
Answer :
52.
The number of stereoisomers obtained by bromination of $$trans - 2 - butene$$ is
A
1
B
2
C
3
D
4
Answer :
1
Anti addition of $$B{r_2}$$ on trans alkene provides meso compound.
53.
Which of the following compounds will exhibit geometrical
isomerism ?
A
2 - Phenyl - 1 - butene
B
1, 1 - Diphenyl - 1 - propene
C
1- Phenyl - 2 - butene
D
3 - Phenyl - 1 - butene
Answer :
1- Phenyl - 2 - butene
1- Phenyl - 2 - butene the two groups around each of the doubly bonded carbon
Because, all are different. This compound can show $$cis-$$ and $$trans-$$ isomerism.
54.
Which of the following compounds will exhibit $$cis-trans$$ ( geometrical ) isomerism?
A
2 - butene
B
2 - butyne
C
2 - butanol
D
butanal
Answer :
2 - butene
TIPS/Formulae :
$$cis-trans -$$ Isomerism is due to restricted rotation either due to carbon-carbon double bond or due to cyclic structure.
NOTE : Geometrical Isomerism : The isomers which possess the same structural formula but differ in the spatial arrangement of the groups around the double bond are known as geometrical isomers.
55.
Match the column I with column II and mark the appropriate choice.
A
A - iv, B - iii, C - i, D - ii
B
A - i, B - iii, C - ii, D - iv
C
A - iii, B - iv, C - ii, D - i
D
A - iv, B - i, C - ii, D - iii
Answer :
A - iii, B - iv, C - ii, D - i
No explanation is given for this question. Let's discuss the answer together.
56.
The absolute configuration of
A
$$S,S$$
B
$$R,R$$
C
$$R,S$$
D
$$S,R$$
Answer :
$$R,R$$
The absolute configuration is $$\left( {R,R} \right)$$
( using priority rules to get the absolute configuration ) So the correct answer is (B)