Column A 1. Decomposition of copper carbonate 2. Decomposition of potassium chlorate 3. Reaction of nitrogen and hydrogen 4. Reaction of zinc and hydrochloric acid 5. Reaction of sulphur dioxide and oxygen Columns B a. oxygen b. sulphur trioxide c. hydrogen gas d. ammonia e. carbon dioxide

Column A 1. Decomposition of copper carbonate 2. Decomposition of po

1.	Column A 1. Decomposition of copper carbonate 2. Decomposition of potassium chlorate 3. Reaction of nitrogen and hydrogen 4. Reaction of zinc and hydrochloric acid 5. Reaction of sulphur dioxide and oxygen Columns B a. oxygen b. sulphur trioxide c. hydrogen gas d. ammonia e. carbon dioxide
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