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JEE CHEMISTRY MCQ: ALCOHOLS & PHENOLS & ETHERS

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C4H8O2(Ester A)+CH3MgBr(2 parts)→H3O+C4H10OAlcohol(B)\underset{\text{(Ester A)}}{\mathrm{C}_4 \mathrm{H}_8 \mathrm{O}_2}+\underset{\text{(2 parts)}}{\mathrm{CH}_3 \mathrm{MgBr}} \xrightarrow{\mathrm{H}_3 \mathrm{O}^{+}} \underset{\text{Alcohol(B)}}{\mathrm{C}_4 \mathrm{H}_{10} \mathrm{O}}

Alcohol B\text{B} reacts faster with Lucas reagent. Hence A\text{A} and B\text{B} are
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Correct option: A
CH3−COO−C2H5,(CH3)3COH\mathrm{CH}_3-\mathrm{COO}-\mathrm{C}_2 \mathrm{H}_5,\left(\mathrm{CH}_3\right)_3 \mathrm{COH}
Option A is correct because the ester CH3−COO−C2H5\mathrm{CH}_3-\mathrm{COO}-\mathrm{C}_2 \mathrm{H}_5 reacts with excess Grignard reagent to form the tertiary alcohol (CH3)3COH(\mathrm{CH}_3)_3 \mathrm{COH}, which reacts fastest with Lucas reagent.

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Assertion (A): Isopropyl alcohol is preferred over ethanol.

Reason (R): Isopropyl alcohol is used as an antiseptic for skin before giving injections. Germinated Barley (an enzyme) is a source of enzyme: The process of converting alkyl halides into alcohols involves The b.p. of alcohols are….than corresponding thiols. Which of the following can not be used to oxidise primary alcohols to aldehydes Conc. H2SO4\mathrm{H}_2 \mathrm{SO}_4 heated with excess of C2H5OH\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH} at 140∘C140^{\circ} \mathrm{C} to form
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