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Question

Write with balanced chemical equation, what happens when hydrogen sulphide is passed through aqueous solution of lead nitrate.

WBBSE Class X Physical Science Inorganic Chemistry 03 Mark 2025

Answer

When hydrogen sulphide (H₂S) is passed through an aqueous solution of lead nitrate [Pb(NO₃)₂], a black precipitate of lead sulphide (PbS) is formed and nitric acid (HNO₃) is produced.

Balanced Chemical Equation:

Pb(NO₃)₂ + H₂S → PbS↓ + 2HNO₃

Observation:

A black precipitate of lead sulphide (PbS) is formed.

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