When rain is accompanied by a thunder storm the collected rain water will have pH value(a) slightly lower than that of rain water without thunderstorm (b) slightly higher than that when the thunderstorm is not there.(ć) uninfluenced by occurrence of thunderstorm.(d) Which depends on the amount of dust in air.

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When rain is accompanied by a thunderstorm, the collected rain water will have a pH value slightly lower than that of rain water without thunderstormPure water does not undergo ionisation naturally Due to the action of thunderstorm ,H2O produces hydronium ion.As a result of production of H+ ph lowers slightly as compared to neutral pH.(pH=7)