Give reasons for the following.(a) Policemen regulatingtraffic often wear masks.(b) Whenwater is heated , bubbles are observed.

Give reasons for the following.(a) Policemen regulatingtraffic often w

1.	Give reasons for the following.(a) Policemen regulatingtraffic often wear masks.(b) Whenwater is heated , bubbles are observed.
Answer» Solution :(a) Policemen wear MASKS in order to protect themselves from smoke and dust particles emitted by vehicles. (B)When water is heated , the air dissolved in it COMES out in the form of tiny BUBBLES.