PDF chapter test TRY NOW
Fill in the blanks with the correct option given below in the table:
| Greenhouse effect | Sunspots | CNG | 315 |
| Photon | Unstable | Chlorine | Supersonic |
| Industrialization | Photodissociation | Afforestation | Visible light |
| -18 | Global warming | Ozone-depleting | Greenhouse |
1. Ozone is poisonous and __________ gas near the surface of the earth.
2. Carbon dioxide, methane, nitrous oxide, hydrofluorocarbons, water vapour etc. are known as _________ gases.
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