Give balanced equations for the following reactions using sulphuric acid. 1. Formation of a black mark on a piece of wood on addition of conc. H 2 SO 4 to it. 2. Oxidation of a foul smelling acidic gas, heavier than air and fairly soluble in H 2 O by conc. H 2 SO 4 . 3. Formation of an acid salt from sulphuric acid and (a) an alkali (b) a sodium salt. 4. Formation of a hydrocarbon from an organic compound 5. Formation of sulphur dioxide using a metal below hydrogen in the activity series.

1. 2. H 2 S + H 2 SO 4 (conc.) S + 2H 2 O + SO 2 3. (a) Formation of an acid salt from sulphuric acid and an alkali (NaOH): NaOH [insufficient] + H 2 SO 4 (dil.) NaHSO 4 + H 2 O (b) Formation of an acid salt from sulphuric acid and a sodium salt (NaCl): 4. 5. Cu + 2H 2 SO 4 (conc.) CuSO 4 + 2H 2 O +SO 2

Chemistry

Give balanced equations for the following reactions using sulphuric acid.
Formation of a black mark on a piece of wood on addition of conc. H₂SO₄ to it.
Oxidation of a foul smelling acidic gas, heavier than air and fairly soluble in H₂O by conc. H₂SO₄.
Formation of an acid salt from sulphuric acid and (a) an alkali (b) a sodium salt.
Formation of a hydrocarbon from an organic compound
Formation of sulphur dioxide using a metal below hydrogen in the activity series.

Sulphuric Acid

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Match the conversions in column 'X' using sulphuric acid, with the type of chemical property of sulphuric acid A to E it represents in column 'Y'
X Y
1. Nitre → Nitric acid A: As an oxidising agent
2. Copper [II] oxide → Copper [II] sulphate B: As a dibasic acid
3. Copper → Copper [II] sulphate C: As an acid when dilute
4. Ethanol [ethyl alcohol] → Ethene D: As a least or non-volatile acid
5. Sodium hydroxide → Sodium bisulphate and sodium sulphate As a dehydrating agent.

X	Y
1. Nitre → Nitric acid	A: As an oxidising agent
2. Copper [II] oxide → Copper [II] sulphate	B: As a dibasic acid
3. Copper → Copper [II] sulphate	C: As an acid when dilute
4. Ethanol [ethyl alcohol] → Ethene	D: As a least or non-volatile acid
5. Sodium hydroxide → Sodium bisulphate and sodium sulphate	As a dehydrating agent.

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Select the correct substance from the substances A to J which react with the sulphuric acid to give the product 1 to 10. [State whether the acid used in each case is dilute or concentrated].
A : Iron
B : Sodium carbonate
C : Sodium chloride
D : Formic acid
E : Sodium nitrate
F : Sodium sulphite
G : Ethyl alcohol
H : Sodium sulphide
I : Sodium hydroxide (excess)
J : Hydrogen sulphide
Product — Sulphur dioxide
Product — Sulphur
Product — Hydrogen
Product — Hydrochloric acid
Product — Sodium sulphate
Product — Carbon dioxide
Product — Carbon monoxide
Product — Nitric acid
Product — Hydrogen sulphide
Product — Ethene
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Chemistry

Sulphuric Acid

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