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ICSE Class 10 Chemistry 2022 Paper

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Distinguish between the following as directed :
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Question : 48 of 55
Marks: +1, -0
Sodium sulphite solution and sodium sulphate solution.
[using dilute H2SO4\mathrm{H_2SO_4} ]
Solution:  
 Sodium sulphite solution Na2SO3\mathrm{Na_2SO_3}  Sodium sulphate Na2SO4\mathrm{Na_2SO_4}
 It is warmed with dilute sulphuric acid a colourless gas with a pungent and suffocating smell is evolved, when this gas is buffled through acidified solution of potassium dichromate it turns its colour from orange to green.  No such reaction
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