Identify the Anion present in Compound Z which on reacting with dilute Sulphuric acid liberates a gas which turns lime water milky, but the gas has no effect on acidified Potassium dichromate solution?

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Solution

The Anion present is Carbonate Ion,CO₃^2-.
The compound Z is sodium carbonate(Na₂CO₃). It reacts with dil.sulphuric acid gives sodium sulphate, liberates a gas which is carbon dioxide(CO₂), and water..
Na₂CO₃(aq) + H₂SO₄(aq) ⇢Na₂SO₄ (aq) + CO₂(g) + H₂O(aq)
When carbon dioxide is passed through acidified potassium dichromate there is no change.i.e,carbon dioxide has no effect on acidified potassium dichromate.

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Q. 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

Name the anion [negative ion] present in the following compound:
Compound D when warmed with dilute H₂SO₄ give a gas which turns acidified potassium dichromate solution green.

Q. Identify the anion present in the following compounds:
Compound

Z

which on reacting with dilute sulphuric acid liberates a gas which turns lime water milky, but the gas has no effect on acidified potassium dichromate solution.

Q. 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?

Q. A water soluble salt when treated with dilute hydrochloric acid produces brisk effervescence . The gas evolved turns lime water milky but has no effect on acidified potassium dichromate .the salt produce a white ppt. when treated with NaOH solution which remains insoluble in excess . Identify the cation and the anion present i the salt .

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