Assertion :Sodium imparts a brilliant, long lasting, yellow flame that masks colors from other ions. Reason: The most common method of identification of sodium ion is the flame test.

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
Option A.
Explanation : The most common method of identification of Na⁺ is the flame test. Sodium imparts a brilliant, long lasting, yellow flame that masks colors from other ions. The test may be performed on a small sample of the unknown treated with concentrated HCl or a few drops of solution unknown treated with concentrated HCl. The flame should be bright and it should last as long as that of 0.1 M NaCl.
Hence, both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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