Chemistry
Sour taste of ‘Coca Cola’ is due to the presence of

Hydrochloric acid
Acetic acid
Phosphoric acid
Formic acid

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Chemistry
The Latin word formica means ant. The name formic acid is derived from this Latin word because

this acid, in ancient times, was used to eliminate ant-hills
ants are attracted by the odour of this acid
this acid was first obtained by the distillation of ants
this corrosive acid is secreted by ants to drive away their enemies

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Chemistry
Table salt gets moist during rainy season because

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

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