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Question
Name the anion [negative ion] present in the following compound:
Compound D when warmed with dilute H2SO4 gives a gas which turns acidified potassium dichromate solution green.
Solution 1
Sulphuric acid when treated with sulphites gives sulphate salts, water and sulphur dioxide gas. Sulphur dioxide turns potassium dichromate solution green. Thus the negative ion is Sulphite ion.
Solution 2
SO32−
Notes
Students should refer to the answer according to their questions.
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