The isomerism exhibited by alkyl cyanide $(R-CN)$ and alkyl isocyanide $(R-NC)$ is:

For which of the following factors can the structural isomers $C_2H_5OH$ and $CH_3OCH_3$ be assumed to have the same value? (Assuming ideal behavior)

$o-$Cresol and benzyl alcohol are .... of each other.

Which of the following is not a functional isomer of the others?

How many possible structural isomers are there for the compound with the molecular formula $C_3H_7Cl$?

The number of possible structural isomers of $C_3H_4$ is $...$