Which one of the combinations will give propanaldehyde on dry distillation?

Match the following:
| List-$I$ | List-$II$ |
| :--- | :--- |
| $(A)$ Acid chloride to aldehyde | $(I)$ $DIBAL-H$ |
| $(B)$ Benzene to benzaldehyde | $(II)$ $CO, HCl, \text{anhyd. } AlCl_3$ |
| $(C)$ Acetylene to aldehyde | $(III)$ $HgSO_4, H_2SO_4$ |
| $(D)$ Ester to aldehyde | $(IV)$ $H_2, Pd-BaSO_4$ |

Which of the following reagents/reactions will convert $A$ to $B$?

To synthesise $1.0 \ mole$ of $2-$methylpropan$-2-$ol from ethyl ethanoate,how many equivalents of $CH_{3}MgBr$ reagent will be required? (Integer value)

What are $X$ and $Y$ in the following reactions?

Chromyl chloride converts a methyl group to a chromium complex,which on acid hydrolysis gives the corresponding aldehyde. This reaction is called: