Cyclohexene is treated with hot acidic KMnO_4 to give an...

Cyclohexene undergoes oxidative cleavage of the double bond upon treatment with hot acidic $\text{KMnO}_4$, opening the ring to form hexanedioic acid (adipic acid) as product 'A'.

When hexanedioic acid is heated strongly with excess ammonia, it first forms an ammonium salt which on strong heating loses water molecules to form an amide. Since it is a dicarboxylic acid, both carboxyl groups are converted to amide groups, yielding hexanediamide (adipamide) as product 'B'.

Reaction:
Cyclohexene $\rightarrow$ $\text{HOOC}-(\text{CH}_2)_4-\text{COOH}$ (Product A)
$\text{HOOC}-(\text{CH}_2)_4-\text{COOH}$ + excess $\text{NH}_3$ + strong heat $\rightarrow$ $\text{H}_2\text{NOC}-(\text{CH}_2)_4-\text{CONH}_2$ (Product B)

Answer: Hexanediamide