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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$KOH + {O_3} \to coloured\,solid\,(a) + Gas\,(b) + {H_2}O$
Select $CORRECT$ statement
Reason $(R)$: $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right]^{+}$complex ion has an octahedral geometry.
In the light of the above statements, choose the most appropriate answer from the options given below :