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Question

The treatment of a compound X with HIO4 produces CH3CHO and CH3CH2CHO. The compound X is :

A
CH3CH=CHCH2CH3
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B
CH3CH(OH)CH(OH)CH2CH3
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C
CH3CH=CHCH=CH2
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D
CH3CH(OH)CH2CHO
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Solution

The correct option is B CH3CH(OH)CH(OH)CH2CH3
Periodic acid (HIO4) cleaves 1,2 diols to aldehydes and ketones. So, it will react with 2,3-pentadiol to form ethanal and propanal.
The reaction is:
CH3CH(OH)CH(OH)CH2CH3HIO4−−CH3CHO+CH3CH2CHO

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