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Question

An organic compound with the molecular formula C8H8O forms 2,4DNP derivative, reduces Tollen's reagent and undergoes Cannizzaro reaction. On vigorous oxidation, it gives 1,2-benzenedicarboxylic acid. The organic compounds is

A
2-ethylbenzaldehyde
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B
2-methylbenzaldehyde
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C
acetophenone
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D
3-methylbenzaldehyde
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E
henylacetaldehyde
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Solution

The correct option is B 2-methylbenzaldehyde
Since, the compound forms 2,4DNP derivative, so it must be a carbonyl compound.
It reduces tollen's Reagent and undergoes Cannizzaro reaction, so it must contain a CHO group and no αH atoms.
Thus, its possible formula may be CH3C6H4CHO.
Since, it gives 1,2benzenedicarboxylic acid when subjected to oxidatin, so CH3 and CHO groups must be present at successive positions. Thus, the structure of the compound must be
708788_672357_ans_2ada94140fea4651beb7a68e1d9800c0.jpg

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