Q. When rain is accompanied by a thunderstorm, the collected rain water will have a pH value
A) Slightly lower than that of rain water without thunderstorm.
B) Slightly higher than that when the thunderstorm is not there.
C) Uninfluenced by occurrence of thunderstorm.
D) Which depends on the amount of dust in air.
Explanation
(a)
During thunderstorm, there is formation of $NO$ which changes to $NO_{2}$ and ultimately to $HNO_{3}$ (acid rain).
$N_{2} + O_{2} \rightarrow NO\overset{{\ \ \ O}_{2}\ \ \ }{\rightarrow}NO_{2}\overset{{\ \ \ O}_{3}\ \ }{\rightarrow}NO_{3} + O_{2}$
$NO_{3} + O_{2} \rightarrow N_{2}O_{5}\overset{H_{2}O\ \ \ }{\rightarrow}HNO_{3}(pH < 7)$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.