The d- and f-Block Elements — Chemistry STD 12 Science — Question

$A$. $\mathrm{Ti}^{3+}$   $B$. $\mathrm{Cr}^{2+}$   $C$. $\mathrm{Mn}^{2+}$   $D$.$\mathrm{Fe}^{2+}$  $E$. $\mathrm{Sc}^{3+}$

Choose the most appropriate answer from the options given below.

Reason : Conc. $HNO_3$ reacts with metal and first produces a metal nitrate and nascent hydrogen. The nascent hydrogen then further reduces $HNO_3$ to $NO_2$.

$C{H_3} - COOH\xrightarrow{{N{H_3}}}A\xrightarrow{\Delta }B\xrightarrow[{B{r_2}}]{{KOH}}C$

Select the correct option for $'X'$ and $'Y'$