"We feel cooler after sweating in summer." Why ?

Why do we feel cooler after sweating ?

Assertion(A): We feel cool after sweating Reason ( R): We store water is earthen pots during summer.

Aerated water bottles are kept under cold water during summer. Why ?

The roofs of buildings are often painted white during summer. Why?

When we put a drop of, red ink in 100 ml. of water, we observe that all the water becomes purple in colour after some time. Why ?

Pendulum clocks generally go fast in winter and slow in summer.Why ?