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B
Na2SO2
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C
Na2SO3
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D
Na2SO4
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Solution
The correct option is CNa2SO3 In the preparation of sulphur dioxide, sodium sulphite crystals and dilute hydrochloric acid is mixed to produce sodium chloride, sulphur dioxide and water. The reaction is: Na2SO3+2HCl→2NaCl+H2O+SO2