Assertion :PbS is insoluble in excess of NaOH. Reason: PbS has low solubility product than lead hydroxide.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
$P b S$ i.e. lead sulfide is insoluble in excess of $N a O H$ $(s o d i u m$ $h y d r o x i d e)$ . This is because, lead sulfide has a low solubility product which makes it insoluble when $s o d i u m$ $h y d r o x i d e$ is used in excess.
Also, $P b S$ has low solubility product than lead $h y d r o x i d e$ i.e. $P b (O H)_{2}$ .

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(a) Assertion and reason both are correct and reason is correct explanation of assertion.
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