A bud of petunia became reddish purple after first shower of rain.what

1.	A bud of petunia became reddish purple after first shower of rain.what does it indicate
Answer» Petunia is a natural indicator which turns reddish purple if exposed to acid. Now first shower of rains generally contains some acid which is formed by reacting of sulphur dioxide and carbon dioxide with water present in atmosphere. Due to the presence of sulphuric acid and carbonic acid, after the first shower of rain the petunia flowers turn reddish purple as they are exposed to the slightly acidic water. Hope it helps As first rain is acidic Petunia is a natural indicator which turns reddish purple if exposed to acid. Now first shower of rains generally contains some acid which is formed by reacting of sulphur dioxide and carbon dioxide with water present in atmosphere. Due to the presence of sulphuric acid and carbonic acid, after the first shower of rain the petunia flowers turn reddish purple as they are exposed to the slightly acidic water. Hope it helps!?

A bud of petunia became reddish purple after first shower of rain.what does it indicate