Which of the compound is soluble in ${\mathrm{H}}_{\mathrm{2}}\mathrm{O}$?

Which one is the most reactive towards the nucleophilic addition reaction?

Which of the followings is the most reactive towards addition reaction of hydrogen cyanide to form corresponding cyanohydrin?

The CORRECT order of reactivity of aldehydes and ketones towards hydrogen cyanide is _______.

When ethanal reacts with ${\mathrm{CH}}_{\mathrm{3}}\mathrm{MgBr} \text{and} {\mathrm{C}}_{\mathrm{2}}{\mathrm{H}}_{\mathrm{5}}\mathrm{OH}/\text{dry} \mathrm{HCl},$ the products formed are ______.

Formaldehyde reacts with ammonia to give _______.

Acetaldehyde reacts with phenyl hydrazine, the type is _______.

Aldehydes or ketones when treated with ${\mathrm{C}}_{\mathrm{6}}{\mathrm{H}}_{\mathrm{5}}-\mathrm{NH}-{\mathrm{NH}}_{\mathrm{2}}$, the product formed is _______.

Aldehydes and ketones can be reduced to corresponding hydrocarbons by _______.