Question

Air is not a compound because it(A) has variable composition(B) has a stoichiometry formula(C)can be purified(D) has a fixed compositiona

Answer 1

(A) has variable composition

Step-by-step explanation

Air is a mixture, but not a compound because it can be separated into different components such as oxygen, nitrogen, etc through the process of fractional distillation.

Therefore, air is not a compound because it has a variable composition.

The correct answer is (A) has variable composition