Acetaldehyde reacts with $Cl_2$ (in excess) to give

Match List $-I$ with List $-II.$

List $-I$ (Products formed)	List $-II$ (Reaction of carbonyl compound with)
$(a).$ Cyanohydrin	$(i).$ $NH_2OH$
$(b).$ Acetal	$(ii).$ $RNH_2$
$(c).$ Schiff's base	$(iii).$ Alcohol
$(d).$ Oxime	$(iv).$ $HCN$

Choose the correct answer from the options given below:

Consider the following reactions:
$A$ $\xrightarrow[(i) CH_3MgBr]{(ii) H_3O^{+}} B$ $\xrightarrow[573 \text{ K}]{Cu} 2\text{-methyl-2-butene}$
The mass percentage of carbon in $A$ is:

How many aldol products (excluding stereoisomers) are obtained in the given reaction?
$CH_3-CH_2-CHO + C_6H_5CHO \xrightarrow[0-5 \ ^{\circ}C]{OH^{\ominus}} ?$

The major product formed in the following reaction is:

The major product of the following reaction is :
$CH_3-CH_2-CHO \xrightarrow[\text{reflux}]{\text{excess } HCHO / \text{alkali}} ?$