Which of the following reactions will give Hoffmann alkene as a major product?

Choose the halogen which is most reactive towards $SN1$ reaction in the given compounds $(A, B, C, D)$:

Vicinal and geminal dihalides can be distinguished by using:

Dehydrohalogenation in monohaloalkanes produces

The correct sequence of reagents for the conversion of $X$ to $Y$ is :

Two isomers $(A)$ and $(B)$ with molar mass $184 \ g/mol$ and elemental composition $C, 52.2 \ \%; H, 4.9 \ \%$ and $Br, 42.9 \ \%$ give benzoic acid and $p$-bromobenzoic acid,respectively,on oxidation with $KMnO_4$. Isomer '$A$' is optically active and gives a pale yellow precipitate when warmed with alcoholic $AgNO_3$. Isomer '$A$' and '$B$' are,respectively .... .