85) In which of the following compounds, addition of HBr in presence and absence of peroxide will have no effect?

Answer is:

2−butene

Explanation:

Markownikov and anti Markownikov addition is applicable only on asymmetrical alkenes, so, 2−butene being a symmetrical alkene would give the same product in both the cases.

Organic Chemistry MCQ with Answers

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86) The alkene that exhibits geometrical isomerism is:

Answer is:

2−butene

87) One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is:

Answer is:

2−butene

88) Acetylene and HCHO react in the presence of copper acetylide catalyst to form:

Answer is:

2−butyne−1,4−diol

89) Anti Markownikov′s addition of HBr is not observed in:

Answer is:

But−2−ene

Explanation:

Not observed in symmetrical alkenes.

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85) In which of the following compounds, addition of HBr in presence and absence of peroxide will have no effect?

2−butene

Organic Chemistry MCQ with Answers

Related Organic Chemistry MCQ with Answers

86) The alkene that exhibits geometrical isomerism is:

2−butene

87) One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is:

2−butene

88) Acetylene and HCHO react in the presence of copper acetylide catalyst to form:

2−butyne−1,4−diol

89) Anti Markownikov′s addition of HBr is not observed in:

But−2−ene

Organic Chemistry MCQ with Answers