Some of the gases used in industry are stored in cylinders.
The cylinders are painted in different colours according to which gas is stored in them. Why is it an advantage to use different colours?
The table below gives information about five gases. There is no information given about natural gas.
| Name of gas | nitrogen | neon | carbon monoxide | argon | hydrogen | natural gas |
|---|---|---|---|---|---|---|
| Formula of gas | N2\text{N}_2N2 | Ne\text{Ne}Ne | CO\text{CO}CO | Ar\text{Ar}Ar | H2\text{H}_2H2 | |
| Relative formula mass (MrM_rMr) | 28 | 20 | 28 | 40 | 2 |
Which two gases in the table are noble gases?
Which gas in the table makes up approximately 78% of dry air?
Why is it not possible to give a single chemical formula or a fixed relative formula mass for natural gas in the table?
Carbon monoxide and nitrogen both have a relative formula mass of 28. State one hazard of carbon monoxide that makes it much more dangerous to handle than nitrogen.
State which one of the gases in the table is:
reacted with nitrogen to manufacture ammonia.
State which one of the gases in the table is:
used in advertising signs to produce a distinctive red-orange glow.
State which one of the gases in the table is:
used to provide an inert atmosphere during high-temperature arc welding.
10 exam-style questions on Edexcel IGCSE Chemistry Gases in the atmosphere. Each one has a worked solution and a mark scheme showing where the marks go.