An organic compound X with molecular formula $C_{5} H_{10} O$ gives test with phenyl hydrazine but gives a negative response to iodoform test and Tollen’s test. It produces n-pentane on reduction. The compound could be

pentanal

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pentan-2-one

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pentan-3-one

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amyl alcohol

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Solution

The correct option is C pentan-3-one
$O ∥ C H_{3} C H_{2} - C - C H_{2} C H_{3}$
This compound lacks $C H_{3} C O$ or $C H_{3} C H (O H)$ group hence gives negative Iodoform test. It is a ketone hence gives negative Tollen’s test. It contain 5C hence gives n-pentane upon reduction.

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An organic compound X with molecular formula C5H10O gives test with phenyl hydrazine but gives a negative response to iodoform test and Tollen’s test. It produces n-pentane on reduction. The compound could be

The correct option is C pentan-3-one O ∥CH3CH2−C−CH2CH3 This compound lacks CH3CO or CH3CH(OH) group hence gives negative Iodoform test. It is a ketone hence gives negative Tollen’s test. It contain 5C hence gives n-pentane upon reduction.

An organic compound X with molecular formula $C_{5} H_{10} O$ gives test with phenyl hydrazine but gives a negative response to iodoform test and Tollen’s test. It produces n-pentane on reduction. The compound could be

The correct option is C pentan-3-one
$O ∥ C H_{3} C H_{2} - C - C H_{2} C H_{3}$
This compound lacks $C H_{3} C O$ or $C H_{3} C H (O H)$ group hence gives negative Iodoform test. It is a ketone hence gives negative Tollen’s test. It contain 5C hence gives n-pentane upon reduction.