Question

Which of the following represents a compound? C20 H2O O2 H2

Answer 1

Answer: Option (b) is the correct answer.

Explanation:

A compound is defined as a substance that has two or more number of different atoms which are chemically combined to each other in a fixed ratio by mass.

For example, $H_{2}O$ contains two atoms of hydrogen and one atom of oxygen which are chemically combined together in 2:1 ratio. Therefore, it is a compound.

On the other hand, if a substance contains only atoms of one type of element then it is known as a molecule.

For example, $C_{2}$, $H_{2}$, and $O_{2}$ are all molecules.

Thus, we can conclude that out of the given options $H_{2}O$ represents a compound.

Answer 2

The answer is C2O.............