Question

Which formula represents a hydrocarbon?
(1) CH3I (3) CH3CH3
(2) CH3NH2 (4) CH3OH

Answer 1

Contains only Carbon and Hydrogen.

(3) CH3CH3

Answer 2

Answer: The correct answer is Option 3.

Explanation:

Hydrocarbon is defined as the species in which a covalent bond is present between only hydrogen and carbon atoms. Presence of only hydrogen and carbon atoms is considered as a hydrocarbon.

From the given options:

Option 1: $CH_3I$

Here, a bond is present between carbon and iodine. Thus, it is not considered as a hydrocarbon.

Option 2: $CH_3NH_2$

Here, a bond is present between carbon and nitrogen. Thus, it is not considered as a hydrocarbon.

Option 3: $CH_3CH_3$

Here, a bond is present between carbon and hydrogen. Thus, it is considered as a hydrocarbon.

Option 4: $CH_3OH$

Here, a bond is present between carbon and oxygen. Thus, it is not considered as a hydrocarbon.

Hence, the correct answer is Option 3.