Why the floor becomes cool when it is mopped with water?

State whether True or False. The floor becomes cold after mopping it with water.

A bicycle pump becomes hot when air is pumped into the tube. Why?

Why we feel cool when spirit is poured on our hand?

Why does KCl become violet in colour when it is heated in presence of potassium vapour?

Explain why lime water becomes turbid when CO_2 is passed through it and the turbid solution becomes clear again when more CO_2 is passed through it.

Why sugar is soluble in water?

Tea gets cooled when sugar is added to it. Why?

Why does oil spread over water when it is poured over water?

A fishy smell is obtained when F_(2) is passed through water- why?

Why does the path of light become visible when passed through a colloidal solution?