The Natural Gaseous Constituents And Their Proportion In The Air Jamb Chemistry Past Questions
Question 1
Due to the high reactivity of sodium, it is usually stored under
- A. water
- B. mercury
- C. paraffin
- D. phenol
Question 2
When air which contains the gases Oxygen, nitrogen, carbondioxide, water vapour and the rare gases, is passed through alkaline pyrogallol and then over quicklime, the only gases left are;
- A. nitrogen and carbondioxide
- B. the rare gases
- C. nitrogen and oxygen
- D. nitrogen and the rare gases
Question 3
| GAS | CO\(_2\) | N\(_2\) | O\(_2\) |
| % BY VOLUME | 4 | 72 | 24 |
- A. CO\(_2\) and O\(_2\)
- B. N\(_2\) and CO\(_2\)
- C. CO\(_2\), O\(_2\) and N\(_2\)
- D. O\(_2\) and N\(_2\)
Question 4
When a bottle of Coca-Cola is opened, bubbles of evolve. The gas is?
- A. hydrogen
- B. carbon monoxide
- C. carbon dioxide
- D. sulphur oxide
- E. chlorine
Question 5
The nitrogen gas obtained by burning an excess of phosphorus in air has a density higher than the nitrogen from nitrogen compounds because the nitrogen from air is contaminated with?
- A. some unburnt phosporus
- B. P2O5 vapour
- C. some oxygen
- D. rare gases
- E. carbondioxide
