An organic compound 'X' having molecular formula `C_(5)H_(10)O` yield phenylhydrazone and gives negative response to the iodoform test and Tollens test . It produces n-pentane on reduction. 'X' could be

Options

A. Pentan -3-one
B. n-amyl alcohol
C. pentanal
D. pentan-2- one

Answer

A

Explanation

Since the compound gives phenyl hydrazone , it must be an aldehyde or a ketone . For iodoform test there must be ` CH_3 - overset(O ) overset(||)C-` group and for Tollen.s test -CHO group is required , hence `CH_3 - overset(O ) overset(||) C-` and `-CHO` groups are absent . it gives n- pentane on reduction and therefore , it is a straight chain compound , the compound is
` CH_3 CH_2 - overset(O ) overset(||) C-CH_2CH_3` : pentan -3- one