Chemistry
Candle is a mixture of

Bees wax and paraffin wax
Paraffin was and stearic acid
Bees wax and stearic acid
Higher fatty acids and stearic acid

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Chemistry
Table salt gets moist during rainy season because

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

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