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Question
Name the following.
Gases that are harmful to the ozone layer
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Solution
Carbon tetrachloride
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Match the following :
| Column A | Column B |
| (a) Global warming | 1. Hydrated ferric oxide |
| (b) Acid rain | 2. Manganese dioxide |
| (c) Rust | 3. Carbon dioxide |
| (d) Catalyst | 4. Methane |
| (e) Photosynthesis | 5. Nitrogen Dioxide |
Mention the contribution of the following scientists :
- Antoine Lavoisier
- Robert Boyle
- Joseph Priestley
- Sir W. Ramsay
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A list of words is given in a box. Use appropriate words to fill up the blank in the following statement.
Air is a ______ of some gases.
