Sulphur dioxide reacts with sodium hydroxide to form:
A
Sodium hydrogen sulphite
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B
Sodium sulphate
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C
Sodium oxide
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D
Sodium sulphide
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Solution
The correct option is A Sodium hydrogen sulphite Sulphur dioxide reacts with sodium hydroxide solution to form sodium sulphite which reacts further with more sulphur dioxide to form sodium hydrogen sulphite. 2NaOH+SO2→Na2SO3+H2ONa2SO3+H2O+SO2→2NaHSO3