What happens to moist red litmus paper put in a flask containing ammonium gas?

Turns blue

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Remains red

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Turns green

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Turns pink

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Solution

The correct option is A Turns blue
The moist red paper changes to blue when put in a flask containing ammonium gas. Ammonium gas is basic in nature. Blue litmus paper turns red under acidic conditions and red litmus paper turns blue under basic or alkaline condition

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