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Question

What is the major product (s) when 2-methyl-2-butene reacts with (i) O3 (ii) Zn/CH3COOH(aq)?
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A
I+II
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B
II+III
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C
III+IV
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D
II
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Solution

The correct option is D II+III
CH3CH(CH3)=CHCH3+O3ZnandCH3COOH−−−−−−−−−−CH3COCH3+CH3CHO
Ozonolysis allows the cleavage of alkene double bonds by reaction with ozone oxidative work-up leads to aldehydes and ketones. Acetone and acetaldehyde forms as shown in the mechanism. The dotted line indicates two separate product parts.

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