Test Index

JAMB Chemistry 2018 Paper

Question : 11

Total: 87

Which of the following gases may not be dried with concentrated sulphuric acid?

Solution:

Concept:

Concentrated sulphuric acid is an acidic drying agent and cannot dry basic gases because it reacts with them.

Explanation:

Ammonia,

\mathrm{NH}_3

, is a basic gas.

Concentrated

\mathrm{H}_2\mathrm{SO}_4

reacts with

\mathrm{NH}_3

to form ammonium sulphate:

2\mathrm{NH}_3 + \mathrm{H}_2\mathrm{SO}_4 \rightarrow (\mathrm{NH}_4)_2\mathrm{SO}_4

Therefore,

\mathrm{NH}_3

cannot be dried with concentrated sulphuric acid.

Answer:

\mathrm{NH}_3

Go to Question:

Prev Question

Next Question