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Given below are two statements. Statement (I) : The gas liberated on warming a salt with dil H2SO4, turns a piece of paper dipped in lead acetate 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

1. (1) Both Statement I and Statement II are false
2. (2) Statement I is true but Statement II is false
3. (3) Both Statement I and Statement II are true
4. (4) Statement I is false but Statement II is true

Correct answer: (2) Statement I is true but Statement II is false

Solution

Statement I is accurate because the gas released when a sulfide salt is treated with dilute sulfuric acid does indeed turn lead acetate paper black, confirming the presence of sulfide ions. However, Statement II is incorrect as the black color results from the formation of lead sulfide, not lead sulfite.

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