Identify the final product formed on ammonolysis of benzyl chloride followed by the reaction with two moles of $$\mathrm{CH}_3 \mathrm{I}$$.

Which from following elements is isoelectronic with $$\mathrm{Na}^{+}$$?

Which of the following is positively charged sol?

When tert-butyl bromide is heated with silver fluoride, the major product obtained is: