A) \[S{{N}^{1}}\] mechanism
B) SN mechanism
C) any of (a) and (b)
D) none of these
Correct Answer: A
Solution :
Tertiary halide preferentially undergo \[S{{N}^{1}}\] substitution as they can give stable carbocation. \[\underset{t-butylchloride}{\mathop{{{H}_{3}}C-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,}}\,}}\,-Cl}}\,\xrightarrow[-Cl]{slow}\underset{carbocation}{\mathop{{{({{H}_{3}}C)}_{3}}{{C}^{+}}}}\,\]\[\xrightarrow[fast]{+O{{H}^{-}}}{{({{H}_{3}}C)}_{3}}COH\]
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