Take a small quantity of detergent powder or washing soda in your hand and add a little water to it.

Take a small quantity of detergent powder or washing soda in your hand and add a little water to it. What do you feel ? Is there any change in temperature when water is added to detergent ?

Ans. When we add water to detergent powder or washing soda in our hands, it is slippery to touch. Yes, there is change in temperature, temperature increases.