Two aromatic compounds having formula C_7H_8O | vedclass

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Question

(A) The $FeCl_3$ test is used to detect the presence of a phenolic group ($-OH$ group attached directly to the benzene ring).Compounds containing a ph

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$o-$cresol and benzyl alcohol

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(A) The $FeCl_3$ test is used to detect the presence of a phenolic group ($-OH$ group attached directly to the benzene ring).Compounds containing a phenolic group react with neutral $FeCl_3$ to form a violet-colored complex.Among the given options, $o-$cresol ($2-$methylphenol) is a phenol and gives a violet color with $FeCl_3$.Benzyl alcohol $(C_6H_5CH_2OH)$ does not contain a phenolic group (the $-OH$ is on the side chain), so it does not give a violet color with $FeCl_3$.Therefore, $o-$cresol and benzyl alcohol can be distinguished using this test.

Acid	$pKa$
$(a)$ Phenol	$(i)$ $16$
$(b)$ $p$-Nitrophenol	$(ii)$ $0.78$
$(c)$ Ethanol	$(iii)$ $10$
$(d)$ Picric acid	$(iv)$ $7.1$

Two aromatic compounds having formula $C_7H_8O$ which are easily identifiable by $FeCl_3$ solution test (violet colouration) are

Similar Questions

$C_6H_6 + CH_3-CH=CH_2$ $\xrightarrow{H_3PO_4} A$ $\xrightarrow{O_2, \text{heat}} B$ $\xrightarrow{\text{dil. } H_2SO_4} C + D$. $A, C$ and $D$ are:

What are $A, B, C$ and $D$ in the following reactions?
$i)$ Aniline $\xrightarrow[273 \ K]{NaNO_2 \mid HCl} A$ $\xrightarrow{B} \text{Phenol}$
$ii)$ Cumene $\xrightarrow{O_2} C$ $\xrightarrow{D} \text{Phenol} + \text{acetone}$

Electrophilic substitution reaction in phenol takes place at:

Match the following $pKa$ values:
Acid $pKa$
$(a)$ Phenol $(i)$ $16$
$(b)$ $p$-Nitrophenol $(ii)$ $0.78$
$(c)$ Ethanol $(iii)$ $10$
$(d)$ Picric acid $(iv)$ $7.1$

Which of the following is the least acidic?

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