Question

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

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
C
Assertion is correct but Reason is incorrect
D
Both Assertion and Reason are incorrect

Solution

## The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion$$PbS$$ i.e. lead sulfide is insoluble in excess of $$NaOH$$ $$(sodium$$ $$hydroxide)$$. This is because, lead sulfide has a low solubility product which makes it insoluble when $$sodium$$ $$hydroxide$$ is used in excess. Also, $$PbS$$ has low solubility product than lead $$hydroxide$$ i.e. $$Pb(OH)_2$$.  Chemistry

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