Question

Gases which turn red litmus blue

Answer 1

Ammonia is a gas which turns red litmus blue .

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Answer 2

Answer:

For instance, ammonia gas, which is alkaline, turns red litmus paper blue. Chemical reactions other than acid-base can also cause a color change to litmus paper. For instance, chlorine gas turns blue litmus paper white – the litmus dye is bleached, because of presence of hypochlorite ions