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Air and Atmosphere — CHEMISTRY STD 7 — Question

ICSE BoardEnglish MediumSTD 7CHEMISTRYAir and Atmosphere4 Marks
Question
Match the statements in Column A, with those in Column B.

Column A Column B
1. Largest Constituent of air, which dilutes the activity of oxygen.

(a) Oxygen
2. A gas used for filling weather observation balloons. (b) carbon acid
3. An acid formed by the dissolution of sulphur dioxide gas in water. (c) Sulphur acid
4. An acid formed by the dissolution of carbon dioxide in water. (d) Helium
5. A gas vital for respiration. (e) Nitrogen
✓

Answer

Column A Column B
1. Largest Constituent of air, which dilutes the activity of oxygen. (e) Nitrogen
2. A gas used for filling weather observation balloons. (d) Helium
3. An acid formed by the dissolution of sulphur dioxide gas in water. (c) Sulphur acid
4. An acid formed by the dissolution of carbon dioxide in water. (b) carbon acid
5. A gas vital for respiration. (a) Oxygen

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