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Question:

With reference to the scheme given, which of the given statement(s) about T, U, V, and W is (are) correct?

T is soluble in hot aqueous NaOH.

U is optically active.

Molecular formula of W is C10H18O4.

V gives effervescence on treatment with aqueous NaHCO3.

Solution:

The statements A, C, and D are correct.
(A) T is soluble in hot aqueous NaOH. In the alkaline medium, the lactone ring is hydrolyzed to form a sodium salt which increases solubility.
(B) U is optically inactive as no chiral center is present.
(C) Molecular formula of W is C10H18O4.
(D) V gives effervescence on treatment with aqueous NaHCO3 as it contains a -COOH group which reacts with sodium hydrogen carbonate to release carbon dioxide.