Assertion (A): $(CH X_{3}) X_{3} C - OH$ is converted to $(CH X_{3}) X_{3} C - Cl$ by concentrated $HCl$ at room temperature, but not by $NaCl$ in neutral water. Reason (R): Protonation converts the leaving group $OH X^{-}$ into $H X_{2} O$ , a much better leaving group, so that the tertiary carbocation can form.

ABoth A and R are true, and R is the correct explanation of A
BBoth A and R are true, but R is not the correct explanation of A
CA is true but R is false
DA is false but R is true

Answer: A

Both statements are true. Hydroxide is a strong base and leaves only with great difficulty. In acid the oxygen is protonated and neutral water departs, giving the tertiary cation that chloride then captures. R is the explanation for A.

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Assertion (A): (CHX3​)X3​C−OH is converted to (CHX3​)X3​C−Cl by concentrated HCl at room temperature, but not by NaCl in neutral water. Reason (R): Protonation converts the leaving group OHX− into HX2​O, a much better leaving group, so that the tertiary carbocation can form.

Answer: A

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