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प्रश्न
Why is freshly prepared ferrous sulphate solution used in the ring test?
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उत्तर
Freshly prepared ferrous sulphate solution is used in the ring test otherwise. Ferrous sulphate undergoes aerial oxidation and converts to ferric sulphate.
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संबंधित प्रश्न
Write an equation for the following conversions A, B, C and D.

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