From the following compounds,determine the nu | vedclass

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(D) To give a red colouration with ceric ammonium nitrate,the compound must be an alcohol.To give a positive iodoform test,the compound must contain a

Vedclass · Accepted Answer

$3$

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(D) To give a red colouration with ceric ammonium nitrate,the compound must be an alcohol.To give a positive iodoform test,the compound must contain a $CH_3CH(OH)-$ group or a $CH_3CO-$ group.Let us analyze the given compounds:$1$. Acetophenone $(C_6H_5COCH_3)$: Gives iodoform test but is not an alcohol (no red colour with ceric ammonium nitrate).$2$. $1$-phenylpropan-$2$-ol $(C_6H_5CH_2CH(OH)CH_3)$: It is an alcohol (gives red colour with ceric ammonium nitrate) and contains a $CH_3CH(OH)-$ group (gives positive iodoform test).$3$. Acetaldehyde $(CH_3CHO)$: Gives iodoform test but is not an alcohol.$4$. Butan-$2$-ol $(CH_3CH(OH)CH_2CH_3)$: It is an alcohol (gives red colour with ceric ammonium nitrate) and contains a $CH_3CH(OH)-$ group (gives positive iodoform test).$5$. Diethyl ether $(C_2H_5OC_2H_5)$: Neither an alcohol nor a methyl ketone.$6$. $2$-phenylethanol $(C_6H_5CH_2CH_2OH)$: It is an alcohol but does not contain the $CH_3CH(OH)-$ group.$7$. $1$-cyclohexylpropan-$2$-ol $(C_6H_{11}CH_2CH(OH)CH_3)$: It is an alcohol (gives red colour with ceric ammonium nitrate) and contains a $CH_3CH(OH)-$ group (gives positive iodoform test).$8$. $2$-cyclohexylpropan-$2$-ol $(C_6H_{11}C(OH)(CH_3)_2)$: It is an alcohol but does not contain the $CH_3CH(OH)-$ group.Thus,there are $3$ compounds that satisfy both conditions.

From the following compounds,determine the number of compounds that give $(i)$ a red colouration with ceric ammonium nitrate and $(ii)$ a positive iodoform test: $...........$.

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