Which of the following reagent is used for the following reaction?

${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_3 \stackrel{?}{\to }{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CHO}$

In the above reactions, product A and product B respectively are:

The major product (P) in the following reaction is:

The correct order of their reactivity towards hydrolysis at room temperature is:

Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?

The increasing order of the following compounds towards $\mathrm{HCN}$ addition is :

(i)   (ii)  (iii)(iv)