1. Take about 1g sodium chloride in a clean and dry test tube and set up the Apparatus 2. Add some concentrated sulphuric acid to the test tube. In this activity which gas is evolved?
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Answer:
HCl gas
Explanation:
When concentrated sulphuric acid is mixed with sodium chloride, it results in the formation of sodium bisulphate and HCl gas. It (the gas) is acidic and hence can change blue litmus red.
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