Question

A compound $C_{5}H_{10}O (A)$ forms a phenyl - hydrazone and gives negative Tollen's test and a positive Iodoform reaction. It also gives $n$ -pentane on reduction. The compound $(A)$ is

• A. pentanal
• B. $2$ - pentanone
• C. $3$ - pentanone
• D. allyl alcohol

Answer 1

Answer: (B)

$2$ - pentanone

Answer 2

Since, the compound $(A)$ gives a positive iodoform test but negative Tollen's test, so it must be a methyl ketone. From the given molecular formula $C_{5}H_{10}O(A)$ can be $2$-pentanone

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