MCQ
Which of the following react with $NaHS{O_3}$
- A$C{H_3}COC{H_3}$
- B$C{H_3}CHO$
- C$HCHO$
- ✓$All \,of \,these$

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| Column $- I$ | Column $-II$ | ||
| $(A)$ | $V_2O_5$ | $(i)$ | Haber's process |
| $(B)$ | $Ni$ | $(ii)$ | Prepartion of $O_2$ from $KClO_3$ |
| $(C)$ | $MnO_2$ | $(iii)$ | Conversion of $SO_2$ to $SO_3$ |
| $(D)$ | $Fe$ | $(iv)$ | Hydrogenation of oils |


