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Question

A salt D on treatment with dilute sulphuric acid produces a gas which turns lime water milky but has no effect on acidified potassium dichromate solution.Identify the anion present in the compound?


Solution

When dil. Sulphuric acid is added to sodium carbonate and heated, a colourless, odourless gas is evolved. This gas is $$CO_2$$. When $$CO_2$$ is passed through lime water, it turns like water milky due to the formation of calcium carbonate. Also this gas doesn't show any effect when passed through $$K_2Cr_2O_7$$ solution.

Chemistry

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