Which two gases each change the colour of damp red litmus paper?

Ammonia and Chlorine

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Ammonia and Hydrogen Chloride

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Carbon Dioxide and Chlorine

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Carbon Dioxide and Sulphur Dioxide

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Solution

The correct option is A
Ammonia and Chlorine

Ammonia being alkaline turns damp red litmus blue. Chlorine on the other hand bleaches damp red litmus paper to white.

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Similar questions

Two gases found dissolved in natural water are

(a) oxygen and carbon dioxide

(b) hydrogen and oxygen

(d) chlorine and ammonia

Out of the following options, which gases change the colour of damp red litmus paper?

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