The gas X is colourless having a foul smell of rotten eggs. It turns lead acetate paper black. Gas X is formed when zinc sulphide reacts with dilute hydrochloric acid. Name the gas X.

H₂S

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SO₂

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SO₃

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Cl₂

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Solution

The correct option is A
H₂S

Zinc sulphide reacts with dilute sulphuric acid to form zinc chloride and hydrogen sulphide gas. The gas is colourless having a foul smell of rotten eggs. It turns moist blue litmus red. It turns lead acetate paper black.

${(C H_{3} C O O)}_{2} P b + H_{2} S \to P b S b l a c k ↓ + 2 C H_{3} C O O H$

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The gas X is colourless having a foul smell of rotten eggs. It turns lead acetate paper black. Gas X is formed when zinc sulphide reacts with dilute hydrochloric acid. Name the gas X.

The correct option is A H2S Zinc sulphide reacts with dilute sulphuric acid to form zinc chloride and hydrogen sulphide gas. The gas is colourless having a foul smell of rotten eggs. It turns moist blue litmus red. It turns lead acetate paper black. (CH3COO)2Pb+H2S→PbSblack↓+2CH3COOH