In the preparation of Grignard reagent from haloalkane,the metal used is:

Identify the halogen exchange reaction from the following.

Preparation of alkyl halides in the laboratory is least preferred by:

The method of preparation of alkyl fluoride given by the reaction $2R-Br + Hg_2F_2 \rightarrow 2R-F + Hg_2Br_2$ is known as:

Assertion : Alkyl iodide can be prepared by treating alkyl chloride/bromide with $NaI$ in acetone.
Reason : $NaCl/NaBr$ are soluble in acetone while $NaI$ is not.

How many enantiomer pairs are obtained by monochlorination of $2, 3-$dimethylbutane?