JEE Mains · Chemistry · STD 12 - p -Block elements - ll
Given below are two statements:
Statement-I: The gas liberated on warming a salt with dil \(H _2 SO _4\), turns a piece of paper dipped in lead acetate into black, it is a confirmatory test for sulphide ion.
Statement-II: In statement-I the colour of paper turns black because of formation of lead sulphite. In the light of the above statements, choose the most appropriate answer from the options given below:
- A Both Statement-I and Statement-II are false
- B Statement-I is false but Statement-II is true
- C Statement-I is true but Statement-II is false
- D Both Statement-I and Statement-II are true.
Answer & Solution
Correct Answer
(C) Statement-I is true but Statement-II is false
Step-by-step Solution
Detailed explanation
\(Na _2 S+ H _2 SO _4 \rightarrow Na _2 SO _4+ H _2 S\) \(\left( CH _3 COO \right)_2 Pb+ H _2 S \rightarrow \underset{\substack{\text { Black lead } \\ \text { sulphide }}}{ Pbs }+2 CH _3 COOH\)
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