What is the total number of Bravais lattices present for different crystal systems?

Identify compound $$\mathrm{Y}$$ in the following reaction. $$\mathrm{C}_2 \mathrm{H}_5 \mathrm{Cl}+\mathrm{Y} \stackrel{\Delta}{\longrightarrow} \mathrm{C}_2 \mathrm{H}_5 \mathrm{CN}$$

Aniline is treated with $$\mathrm{NaNO}_2+\mathrm{HCl}$$ at low temperature to form:

Which of the following is NOT a difficulty in setting SHE?