The oxidation product of $2-propanol$ with hot conc. $HNO_3$ is

Consider the following reaction sequence: $CH_3CHO$ $\xrightarrow[(ii) H_2O/H^+]{(i) CH_3MgBr} (A)$ $\xrightarrow{H_2SO_4, \Delta} (B)$ $\xrightarrow[(ii) H_2O_2/OH^-]{(i) B_2H_6} (C)$. $(A)$ and $(C)$ are

Which reagent is required to convert cyclohexanol to cyclohexanone?

Which is the best method to prepare cyclohexene from cyclohexanol?

Which of the following benzylic alcohols is a tertiary alcohol?

Dehydration of $2-$butanol yields: