What is the pH of normal rain water? What happens to the pH of rain water if it is accompanied by a thunderstorm and why?

What is the pH of normal rain water? What happens to the pH of rain wa

1.	What is the pH of normal rain water? What happens to the pH of rain water if it is accompanied by a thunderstorm and why?
Answer» Solution :pH of normal rain WATER is about 5.6 When rain is accompanied by a thunderstorm `N_2` and `O_2` of the air COMBINE to FORM NO which is further oxidized to `NO_2` and DISSOLVES in rain water to form `HNO_3`. Hence rain water becomes more acidic and hence pH falls below 5.6.