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(B) The false statement about $S_N1$ (Substitution Nucleophilic Unimolecular) reaction mechanism is: $(B)$ It is a single-step mechanism.$S_N1$ reacti

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It is a single-step mechanism.

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(B) The false statement about $S_N1$ (Substitution Nucleophilic Unimolecular) reaction mechanism is: $(B)$ It is a single-step mechanism.$S_N1$ reaction mechanism is a two-step process. In the first step,the leaving group departs,generating a carbocation intermediate. In the second step,the nucleophile attacks the carbocation,leading to the formation of the substitution product.The correct statements regarding $S_N1$ reaction mechanism are:$(A)$ Intermediate formed during the reaction is a carbocation. This is true as the leaving group departure creates a carbocation intermediate.$(C)$ Concentration of nucleophile does not affect the rate of the reaction. This is true because the rate-determining step is the formation of the carbocation intermediate,which does not involve the nucleophile.$(D)$ Racemization takes place if the reaction is carried out at a chiral carbon in an optically active substance. This is true because the carbocation intermediate is planar and can be attacked by nucleophiles from either side,resulting in the formation of both enantiomers.

Choose the false statement from the following about $S_N1$ reaction mechanism.

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