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

How many structural isomers are possible for the molecular formula ${C_3}{H_7}N$?

Given below are two statements :
Statement $(I) :$ $CH_3CH=CHCH_3$ and $cyclobutane$ are isomeric compounds.
Statement $(II) :$ $CH_3CH_2CH_2CH_2NH_2$ and $(CH_3CH_2)_2NH$ are functional group isomers.
In the light of the above statements,choose the correct answer from the options given below :

Which of the following pairs of alkenes is an example of position isomers?

Among the four compounds,$(i)$ acetone,$(ii)$ propanol,$(iii)$ methyl acetate and $(iv)$ propionic acid,the two that are isomeric are

Tautomerism is exhibited by