Name the products formed when hot and concentrated sulphuric acid reacts with the following :

(a) Sulphur, (b) NaOH, (c) Sugar,

(d) Carbon, (e) Copper.

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Solution

(a) When sulphuric acid reacts with sulphur the product formed is Sulphur dioxide is
formed along with water.
$S + 2 H_{2} S O_{4} ⟶ 3 S O_{2} + 2 H_{2} O$

(b) When sulphuric acid reacts with sodium hydroxide it neutralizes base to form
sodium sulphate along with water

$2 N a O H + H_{2} S O_{4} ⟶ N a_{2} S O_{4} + 2 H_{2} O$

(c) Concentrated H₂SO₄ absorbs water from sugar and acts as dehydrating agent.

$C_{12} H_{22} O_{11} + c o n c . H_{2} S O_{4} - ------- \to 12 C + 11 H_{2} O$

(d) When sulphuric acid reacts with carbon it forms carbon dioxide and sulphur
dioxide gas along with water.
$C + 2 H_{2} S O_{4} ⟶ C O_{2} + 2 H_{2} O + 2 S O_{2}$

(e) When sulphuric acid reacts with copper it forms copper sulphate and sulphur dioxide and water.
$C u + 2 H_{2} S O_{4} ⟶ C u S O_{4} + 2 H_{2} O + S O_{2}$

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Q. Copper reacts with hot and concentrated sulphuric acid to form copper sulphate, sulphur dioxide gas and water. Write f-number and balancing order of each element?

Q. Fill in the blanks using the appropriate words given below :
(Sulphur dioxide, Nitrogen dioxide, Nitric oxide, Sulphuric acid)
(i) Cold, dilute nitric acid reacts with copper to give ____________.
(ii) Hot, concentrated nitric acid reacts with copper to form ____________.

A volatile acid X is formed when sodium chloride reacts with concentrated sulphuric acid. Name this volatile acid.

Give reasons for the following :

(a) Sulphuric acid forms two types of salts with NaOH,

(b) Red brown vapours are produced when concentrated sulphuric acid is added to hydrogen bromide,

(d) Brisk effervescence is seen when oil of vitriol is added to sodium carbonate.

Name the following:
(a) Products obtained by dissolving sulphur dioxide and chlorine in water.
(b) The catalyst used in the contact process.
(c) Solution obtained by dissolving sulphur trioxide in 98% sulphuric acid.
(d) Products obtained by treating zinc with dilute sulphuric acid.
(e) Products obtained by treating ferrous sulphide with dilute sulphuric acid.
(f) The precipitate obtained by treating aqueous lead nitrate with dilute sulphuric acid.
(g) The precipitate obtained by treating aqueous barium chloride with dilute sulphuric acid.
(h) Gases obtained by treating carbon with hot concentrated sulphuric acid.
(i) The property used to prepare HCl and HNO₃ from H₂SO₄.

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Name the products formed when hot and concentrated sulphuric acid reacts with the following : (a) Sulphur, (b) NaOH, (c) Sugar, (d) Carbon, (e) Copper.

Name the products formed when hot and concentrated sulphuric acid reacts with the following :

(a) Sulphur, (b) NaOH, (c) Sugar,

(d) Carbon, (e) Copper.