why does moist blue litmus paper turn red when it is bought near the mouth of the test tube in which green ferrous sulphate crystals are heated. plz answer
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SULPHURIC ACID TURNS BLUE LITMUS INTO RED
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Answer:
HEYA...
IT IS BECAUSE OF THE HEATING OF CRYSTAL OF FERROUS SULPHATE
Explanation:
Heating of crystals of ferrous sulphate releases gases like SO2 and SO3. These are the acidic oxides of sulphur. And we know that, in the existence of acid, the blue litmus becomes red colour. So, since SO2 and SO3 are acidic, so the moist blue litmus becomes red.
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