Question

a white solid on dropped in water produces hissing sound.what the solid may be?give chemical reaction for above.name the product formed?

Answer 1

calcium oxide is the answer it makes hissing sound in water

Answer 2

According to the circumstances mentioned in the question the solid substance is probably the calcium oxide or CaO.

The calcium oxide or CaO reacts with the water and produces calcium hydroxide or Ca(OH)2.

This an exothermic reaction.And due to the creation of heat,the whole reaction produces the hissing sound.

The chemical equation of this reaction is.

CaO + H2O = Ca(OH)2 + Heat (∆)