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(A) Reactivity towards nucleophilic addition reactions depends on steric and electronic factors. As the number and size of alkyl groups attached to th

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$I > II > III > IV$

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(A) Reactivity towards nucleophilic addition reactions depends on steric and electronic factors. As the number and size of alkyl groups attached to the carbonyl carbon increase,the reactivity decreases due to the $+I$ effect (which reduces the electrophilicity of the carbonyl carbon) and increased steric hindrance. $HCHO$ has no alkyl groups,$CH_3CHO$ has one methyl group,$CH_3COCH_3$ has two methyl groups,and $CH_3CH_2COCH_2CH_3$ has two larger ethyl groups. Therefore,the correct decreasing order of reactivity is: $I > II > III > IV$.

List-$I$	List-$II$
$(a)$ $NH_2OH$	$(i)$ Cyanohydrin
$(b)$ $R-NH_2$	(ii) Oxime
$(c)$ $R-OH$	(iii) Schiff base
$(d)$ $H-C\equiv N$	(iv) Acetal

Arrange the following compounds in decreasing order of reactivity towards nucleophilic addition reactions:
$(I) \ HCHO$,$(II) \ CH_3CHO$,$(III) \ CH_3COCH_3$,$(IV) \ CH_3CH_2COCH_2CH_3$

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In Tollen's test for aldehyde,the overall number of electron$(s)$ transferred to the Tollen's reagent formula $[Ag(NH_{3})_{2}]^{+}$ per aldehyde group to form silver mirror is $......$. (Round off to the Nearest integer)

Match the reagents in List-$I$ with the products obtained from their reaction with carbonyl compounds.
List-$I$ List-$II$
$(a)$ $NH_2OH$ $(i)$ Cyanohydrin
$(b)$ $R-NH_2$ (ii) Oxime
$(c)$ $R-OH$ (iii) Schiff base
$(d)$ $H-C\equiv N$ (iv) Acetal

Arrange the following compounds in the increasing order of their reactivity towards the nucleophilic addition of $HCN$:
$1. HCHO$
$2. CH_3COCH_3$
$3. PhCOCH_3$
$4. PhCOPh$

Select the best reagent to carry out the above conversion.

The product $(B)$ in the above reaction is:

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Arrange the following compounds in decreasing order of reactivity towards nucleophilic addition reactions: $(I) \ HCHO$,$(II) \ CH_3CHO$,$(III) \ CH_3COCH_3$,$(IV) \ CH_3CH_2COCH_2CH_3$