Assertion :Lead, tin and bismuth are purified by liquation method. Reason: Lead, tin and bismuth have low m.p. as compared to impurities.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Assertion is incorrect and Reason is correct
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion Liquation process is used when the impurity is less fusible than the metal itself. lead, tin and bismuth have low m.p. as compared to impurities. Hence, lead, tin and bismuth are purified by liquation method. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.