When rain is accompanied by a thunderstorm, the collected rain water will have a pH value

Options

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

A

Explanation

During thunder storm, `N_(2)` and `O_(2)` combine to form oxides of nitrogen
`N_(2)+O_(2)overset("Lightning")(to)2NO`
`2NO+O_(2)overset("Lightning")(to)2NO_(2)`
These oxides are brought down along with rain forming `HNO_(2)` and `HNO_(3)`
`4NO_(2)+2H_(2)O+O_(2) to 4HNO_(3)`
Thus the collected rain water will have a slightly lower pH value .