Case Study Questions for Class 12 Chemistry Chapter 11 Alcohols, Phenols and Ethers

Read the passage given below and answer the following questions:

A compound (X) containing C, H and O is unreactive towards sodium. It also does not react with Schiff’s reagent. On refluxing with an excess of hydroiodic acid, (X) yields only one organic product (Y). On hydrolysis, (Y) yields a new compound (Z) which can be converted into (Y) by reaction with red phosphorous and iodine. The compound (Z) on oxidation with potassium permanganate gives a carboxylic acid. The equivalent weight of this acid is 60.

The following questions are multiple choice question. Choose the most appropriate answer:

(i) The compound (X) is an
(a) acid
(b) aldehyde
(c) alcohol
(d) ether

(ii) The IUPAC name of the acid formed is
(a) methanoic acid
(b) ethanoic acid
(c) propanoic acid
(d) butanoic acid

(iii) Compound (Y) is
(a) ethyl iodide
(b) methyl iodide
(c) propyl iodide
(d) mixture of (a) and (b)

or

Compound (Z) is
(a) methanol
(b) ethanol
(c) propanol
(d) butanol

(iv) Compound (X) on treatment with excess of Cl2 in presence of light gives
(a) α-chlorodiethyl ether
(b) α, α’-dichlorodiethyl ether
(c) perchlorodiethyl ether
(d) none of these

Answers (i) d
(ii) b
(iii) a
or
b
(iv) c

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