$A + H_2O \to B + HCl$
$B + H_2O \to C + HCl$
Compound $(A), (B)$ and $(C)$ will be respectively

Hydrolysis of phosphorus trichloride in water gives:

The oxoacid of phosphorus having the strongest reducing property is

Give the correct characteristic colours of the products $(P, Q, R, S)$ formed in the following reactions:
$(A)\ NO + NO_2 \xrightarrow{< 250 K} P$
$(B)\ 2 NO_2 \longleftrightarrow Q$
$(C)\ Pb(NO_3)_2 \xrightarrow{673 K} R + PbO$
$(D)\ 4 HNO_3 + P_4O_{10} \longrightarrow S + 4 HPO_3$

Why $NH_3$ cannot be dried by $H_2SO_4$,$P_2O_5$,and $CaCl_2$?

Which of the following statements is $NOT$ true for $N_2O$?