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

Which of the following compounds does not exhibit tautomerism?

Identify the correct statement among the following:

Which of the following methods of structural formula representation conventionally uses a point for the front carbon and a circle around it for the rear carbon?

Identify the relationship between the two given compounds:

The number of structural isomers of ${C_4}{H_{10}}O$ is: