$CH_3-CH_2-CH=O$ $\xrightarrow[(2) H^{+}]{(1) \text{Tollen's reagent}} X$ $\xrightarrow[(2) \text{dry distillation}]{(1) Ca(OH)_2} Y$; $Y$ is

Give plausible explanation for each of the following:
$(i)$ Cyclohexanone forms cyanohydrin in good yield but $2,2,6-$trimethylcyclohexanone does not.
$(ii)$ There are two $-NH_2$ groups in semicarbazide. However,only one is involved in the formation of semicarbazones.
$(iii)$ During the preparation of esters from a carboxylic acid and an alcohol in the presence of an acid catalyst,the water or the ester should be removed as soon as it is formed.

Ethanoic acid $+$ $3$-methylbutan-$1$-ol $\underset{\text{traces } H_2SO_4}{\longleftrightarrow} (A)$; Compound $(A)$ is

The major products $Q$ and $R$ from the following reactions,respectively are:

In the given options,which one is correct for the rate of hydrolysis?

Which of the following sets is in the correct order regarding the property mentioned against them?

Sets	Property
$I$. $NCCH_2COOH > FCH_2COOH > H_3CCH_2COOH$	Acidity
$II$. $CH_3CH_2CHO > PhCOCH_3 > PhCHO$	Reactivity
$III$. $H_3COCH_2CH_3 < H_3CCH_2CHO < H_3CCH_2CH_2OH$	Boiling points