Chemistry
Assertion (A): On passing H2S through lead nitrate solution, a black precipitate is formed.
Reason (R): Lead nitrate reacts with H2S to form a black precipitate of PbS.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Practical Chemistry
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Answer
Both A and R are true and R is the correct explanation of A.
Explanation— H2S is colourless gas having a foul smell of rotten eggs. When H2S is passed through lead nitrate solution, a black precipitate of PbS is formed.
Pb(NO3)2 + H2S ⟶ PbS ↓ + 2HNO3
Hence, both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
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