ICSE Class 10 Chemistry 2022 Solved Paper

Distinguish between the following as directed :

Question : 48

Total: 55

Sodium sulphite solution and sodium sulphate solution.
[using dilute H2SO4 ]

Solution:

Sodium sulphite solution Na2SO3	Sodium sulphate Na2SO4
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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