If litmus paper turns blue on reacting with gas dissolved in water, it is :
A
acidic in nature
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B
neutral in nature
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C
basic in nature
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D
both A and C
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Solution
The correct option is C basic in nature A basic gas accepts hydrogen ions. Litmus paper is made from dyes derived from lichens; it is water-soluble, meaning it can be fully dissolved in water. Acids turn blue litmus paper red, and bases turn red litmus paper blue. Strong bases have a caustic effect on organic matter.