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Question

When Sodium carbonate and sodium sulphite react with hydrochloric acid (two separate reactions), the gases evolved are
  1. and respectively
  2. and respectively
  3. and respectively
  4. All of the above


Solution

The correct option is A and respectively
Sodium carbonate on reaction with hydrochloric acid liberates carbondioxide and sodium sulphite on reaction with hydrochloric acid liberates sulphurdioxide
Na2CO3+2HCl2NaCl+H2O+CO2
Na2SO3+2HCl2NaCl+H2O+SO2

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