Correct order of $pK_{a}$ of given compounds is $:-$
$(P) \ CH_{3}COOH$
$(Q) \ FCH_{2}COOH$
$(R) \ ClCH_{2}COOH$
$(S) \ C_{2}H_{5}COOH$

In which of the following reactions will cyanide be obtained as a major product?

Arrange the products $I$,$II$,$III$ from the following reactions in decreasing order of their acid strength.
$A) \text{Propylbenzene} \xrightarrow[\text{ (ii) } H_3O^{+}]{\text{ (i) } KMnO_4 / OH^{-}} I$
$B) CH_3COOH \xrightarrow[\text{ (ii) } H_2O]{\text{ (i) } Br_2 / \text{red } P} II$
$C) \text{Bromobenzene}$ $\xrightarrow[\substack{\text{ (ii) } CO_2 / \text{dry ether} \\ \text{ (iii) } H_3O^{+}}]{\text{ (i) } Mg / \text{dry ether}} III$

Formic acid on heating with concentrated $H_2SO_4$ at $373 \ K$ gives $X$,a colourless substance and $Y$,a good reducing agent. The number of $\sigma$ and $\pi$ bonds in $X$ and $Y$ are respectively:

Name the end product in the following series of reactions:
$CH_3COOH$ $\xrightarrow{NH_3} A$ $\xrightarrow[P_2O_5]{\Delta} B$

Consider the following molecules $:$
$(p) \ CH_3-CH_2-COCl$
$(q) \ CH_3-CH_2-CO-O-COCH_3$
$(r) \ CH_3-CH_2-CO-OCH_2-CH_3$
$(s) \ CH_3-CH_2-CONH_2$
The correct order of rate of hydrolysis is $:$