Question

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

Answer 1

Answer: (A)

slightly lower than that of rain water without thunderstorm

Answer 2

During thunderstorm, there is formation of $NO$ which changes to $N{{O}_{3}}$ and ultimately to $HN{{O}_{3}}$ (acid-rain). ${{N}_{2}}+{{O}_{2}}\xrightarrow{{}}NO\xrightarrow{{{O}_{2}}}N{{O}_{2}}$ $\xrightarrow{{}}{{N}_{2}}{{O}_{5}}\xrightarrow{{{H}_{2}}O}HN{{O}_{3}}(pH<7)$