MCQ
Product $(Q)$ is :-


- A

- B

- C

- ✓








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| Acid | $K_a$ |
| $HCN$ | $6.2\times 10^{-10}$ |
| $HF$ | $7.2\times 10^{-4}$ |
| $HNO_2$ | $4.0\times 10^{-4}$ |
Correct order of increasing base strength of the base $CN^-,F^-$ and $NO_2^-$ will be
$H _2 O (\ell) \rightarrow H _2 O ( g )$
at $T =100^{\circ} C$ and $1$ atmosphere pressure, the correct choice is :
$X$ and $Y$ respectively are :
[At. nos. $Zn = 30, Sc = 21, $$Ti = 22, Cr = 24$]
