Calculate the rate constant of the first order reaction if $$20 \%$$ of the reactant decomposes in 15 minutes.

Which from following methods of structural formula representation uses conventionally a point for front carbon and a circle around it for rear carbon?

Identify substrate '$$\mathrm{A}$$' in the following sequence of reactions.

A $$\mathrm{\mathrel{\mathop{\kern0pt\longrightarrow} \limits_\Delta ^{SOC{l_2}}}}$$ B $$\mathrm{\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{{C_2}{H_5}Cl}^{Na/ether}}}$$ 2-Methylbutane

Which of the following is tertiary benzylic alcohol?