JAMB - Chemistry (2001 - No. 41)

The method used to collect a gas depends on whether it is denser or lighter than air. For example, ammonia gas is collected by downward displacement of air because it is lighter than air. Option C is the correct answer.

Chlorine is heavier than air.

SO\(_2\) is denser than air.

CO\(_2\) is denser than air.