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What will be the action of the following...

What will be the action of the following substances on litmus paper ?
Dry HCl gas, Moistened `NH_(3)` gas, Lemon juice, carbonated soft drink, Curd, Soap solution.

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`ul("Substance") ul("Action on Litmus paper")`
Dry HCl gas No change
Moistened `NH_(3)` gas Turns red to blue
Lemon juice Turns blue to red
Carbonated sof drink Turns blue to red
Curd Turns blue to red
Soap solution Turns red to blue
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