Sulphur dioxide is a colorless gas with a pungent smell. It is acidic in nature.
(iv) **Action on Dry Litmus:**
Sulphur dioxide is acidic, and it will turn blue litmus paper red. Therefore, the action on dry litmus is to turn it red. The presence of an acidic gas like (SO2) can be confirmed by this litmus test.
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(i) **Chemical Equation:**
S+O2----->SO2
(ii) **Name of the Gas:**
Sulphur dioxide (SO2) is formed.
(iii) **Nature of the Gas:**
Sulphur dioxide is a colorless gas with a pungent smell. It is acidic in nature.
(iv) **Action on Dry Litmus:**
Sulphur dioxide is acidic, and it will turn blue litmus paper red. Therefore, the action on dry litmus is to turn it red. The presence of an acidic gas like (SO2) can be confirmed by this litmus test.