The reaction of cis−2−butene with CH<sub>2</sub>I<sub>2</sub> and Zn (Cu) to give cis−1,2−dimethyl cyclopropane is:

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99

Organic Chemistry MCQ with Answers

99) The reaction of cis−2−butene with CH₂I₂ and Zn (Cu) to give cis−1,2−dimethyl cyclopropane is:

Stereospecific reaction

Enantiospecific reaction

Diastereoselective reaction

Regioselective reaction

Answer is:

Stereospecific reaction

Explanation:

The reaction results in the formation of one isomer, hence it is stereospecific.

Organic Chemistry MCQ with Answers

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100) 2−methylbutane on reacting with bromine in the presence of sunlight gives mainly:

1−bromo−3−methylbutane

2−bromo−3−methylbutane

2−bromo−2−methylbutane

1−bromo−2−methylbutane

Answer is:

2−bromo−2−methylbutane

101) Acid catalysed hydration of alkenes except ethene leads to the formation of:

Mixture of secondary and tertiary alcohols

Mixture of primary and secondary alcohols

Secondary or tertiary alcohol

Primary alcohol

Answer is:

Secondary or tertiary alcohol

102) Benzene hexachloride is prepared from benzene and chlorine in sunlight by:

Subsitution reaction

Elimination reaction

Addition reaction

Rearrangement

Answer is:

Addition reaction

103) Reaction of t−butyl bromide with sodium methoxide produces:

Isobutane

Isobutylene

Sodium t−butoxide

t−butyl methyl ether

Answer is:

Isobutylene

Organic Chemistry MCQ with Answers

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99) The reaction of cis−2−butene with CH2I2 and Zn (Cu) to give cis−1,2−dimethyl cyclopropane is:

Stereospecific reaction

Organic Chemistry MCQ with Answers

Related Organic Chemistry MCQ with Answers

100) 2−methylbutane on reacting with bromine in the presence of sunlight gives mainly:

2−bromo−2−methylbutane

101) Acid catalysed hydration of alkenes except ethene leads to the formation of:

Secondary or tertiary alcohol

102) Benzene hexachloride is prepared from benzene and chlorine in sunlight by:

Addition reaction

103) Reaction of t−butyl bromide with sodium methoxide produces:

Isobutylene

Organic Chemistry MCQ with Answers

99) The reaction of cis−2−butene with CH₂I₂ and Zn (Cu) to give cis−1,2−dimethyl cyclopropane is: