Question

# Salts A, B, C, D and E undergo reactions (i) to (v) respectively. Identify the anion present in these salts on the basis of these reactions. Tabulate your answers in the format given below: (i) When silver nitrate solution is added to a solution of A, a white precipitate, insoluble in dilute nitric acid, is formed. (ii) Addition of dilute hydrochloric acid to B produces a gas which turns lead acetate paper black. (iii) When a freshly prepared solution of ferrous sulphate is added to a solution of C and concentrated sulphuric acid is gently poured from the side of the test tube, a brown ring is formed. (iv) When dilute sulphuric acid is added to D, a gas is produced which turns acidified potassium dichromate solution from orange to green. (v) Addition of dilute hydrochloric acid to E produces an effervescence. The gas produced turns limewater milky but does not affect acidified potassium dichromate solution. Salt Anion A   B   C   D   E

Solution

## Salt Anion A Chloride ion (Cl−​) B Sulphide ion (S2−) C Nitrate ion (${\mathrm{NO}}_{3}^{-}$) D Sulphite ion $\left({\mathrm{SO}}_{3}^{2-}\right)$ E Carbonate ion $\left({\mathrm{CO}}_{3}^{2-}\right)$ ChemistryFrank Chemistry - IIStandard X

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