MCQ
Silver nitrate is prepared by
- AThe action of only conc. $HN{O_3}$ on silver
- BHeating silver oxide with $N{O_2}$
- ✓The action of hot dil. $HN{O_3}$ on silver
- DDissolve $Ag$ in aqua-regia
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

$\mathrm{A}+\mathrm{B} \rightarrow \mathrm{C}$
$\text { rate }=\mathrm{k}[\mathrm{A}]^{1 / 2}[\mathrm{~B}]^{1 / 2}$
The reaction is initiated by taking $1 \mathrm{M}$ concentration $A$ and $B$ each. If the rate constant $(k)$ is $4.6 \times 10^{-2} \mathrm{~s}^{-1}$, then the time taken for $\mathrm{A}$ to become $0.1 \mathrm{M}$ is . . . . . . . . . . sec. (nearest integer)