Chemistry
The most commonly used chemicals in the artificial rainmaking or cloud seeding are

Dry Ice (Frozen CO2)
Sodium Chloride (NaCl)
Silver Iodide (Ag I)
All of these

ANSWER DOWNLOAD EXAMIANS APP

Chemistry
Table salt gets moist during rainy season because

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

ANSWER DOWNLOAD EXAMIANS APP