Which of the following compounds is obtained by using the Finkelstein reaction?

The reaction of $Cl_2$ with $CS_2$ in the presence of $AlCl_3$ gives .......

Identify the name of the reaction in which alkyl fluorides are prepared by heating alkyl bromide or alkyl chloride with metallic fluorides like $AgF$,$Hg_2F_2$,$CoF_2$,or $SbF_3$.

The major product in the following reaction sequence is:

The product formed by the reaction of $C_2H_5OH$ with thionyl chloride is ...... .

Which of the following is used as a catalyst for preparing a Grignard reagent?