Chemistry
The acid which fails to liberate carbon dioxide from sodium bicarbonate is :

Acetic acid
Sulphuric acid
Formic acid
Carbonic acid

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Chemistry
Table salt gets moist during rainy season because

Sodium chloride is hygroscopic
Sodium chloride contains some quantity of sodium iodide
Sodium chloride is deliquescent
Sodium chloride contains hygroscopic impurities like magnesium chloride

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