NEET UG CHEMISTRY MCQ: ALCOHOLS & PHENOLS & ETHERS

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Assertion:- Phenol is stronger acid than alcohols.

Reason:- Phenol is stabilised by resonance whereas alcohol are not.

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Correct option: B

If both Assertion & reason are True but Reason is not a correct explanation of the Assertion

Option B (If both Assertion & reason are True but Reason is not a correct explanation of the Assertion) is correct because while both the assertion and reason are true, the stabilization of the phenoxide ion by resonance is not the *only* reason for phenol's higher acidity compared to alcohols; inductive effects also play a role.

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Ethers are made free from peroxide linkage on distilling impure sample with: The product 'B' in the following reaction is

{\text{C}}{{\text{H}}_3}{\text{C}}{{\text{H}}_2}{\text{OH}}\xrightarrow{{{\text{PCC}}}}{\text{A}}\xrightarrow[{\left( {{\text{ii}}} \right){\text{ }}{{\text{H}}_2}{\text{O/}}{{\text{H}}^ + }}]{{\left( {\text{i}} \right){\text{ HCN}}}}{\text{B}}

Fenton’s reagent is: Assertion:- Isopropyl benzene reacts with

\mathrm{O}_2

and acid gives phenol.

Reason:- Initially isopropyl benzene converts into 2-phenyl propan-2-ol. When an ether is treated with

{\mathrm{P}_2}{\mathrm{S}_5}

we get: Physical properties of: