Copy and complete the following table. Column 3 has the names of gases to be prepared using the substance you enter in Column 1, alongwith dilute or concentrated sulphuric acid, as indicated in Column 2.

Column 1

Column 2

Column 3

Substance reacted
with acid

Dilute or concentrated
sulphuric acid

Gas

hydrogen

carbon dioxide

only chlorine

Write the equation for the laboratory preparation of:
(i) Sodium sulphate using dilute sulphuric acid.
(ii) Lead sulphate using dilute sulphuric acid.

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Solution

Column 1 Column 2 Column 3

Substance reacting
with acid Dilute or concentrated
sulphuric acid Gas

Metals (zinc) Dilute sulphuric acid Hydrogen

Metallic carbonates (calcium carbonate) Dilute sulphuric acid Carbon dioxide

Bleaching powder Dilute sulphuric acid Only chlorine

Given below are the balanced chemical equations for the laboratory preparation of:

(i) Sodium sulphate using dilute sulphuric acid:

Na₂SO₃ + H₂SO₄ → Na₂SO₄ + H₂O + SO₂

(ii) Lead sulphate using dilute sulphuric acid:

Pb(NO₃)₂+ H₂SO₄ → PbSO₄↓ + 2HNO₃

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Match the substances in Column I with those in Column II. [5 MARKS]

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Column 1	Column 2	Column 3
Substance reacted with acid	Dilute or concentrated sulphuric acid	Gas
		hydrogen
		carbon dioxide
		only chlorine

Column 1	Column 2	Column 3
Substance reacting with acid	Dilute or concentrated sulphuric acid	Gas
Metals (zinc)	Dilute sulphuric acid	Hydrogen
Metallic carbonates (calcium carbonate)	Dilute sulphuric acid	Carbon dioxide
Bleaching powder	Dilute sulphuric acid	Only chlorine