Assertion :Alkali metals have high affinity for oxygen. Reason: Alkali metals have greater tendency to get oxidised, which indicates that they are strong reducing agents.

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
The valence shell electronic configuration of alkali metals is $n s^{1}$ . Thus by losing one electron, they can acquire stable noble gas configuration. This results in their tendency to get oxidize and makes them a good reducing agent. Thus have a high affinity for oxygen.
Assertion is correct and the reason is the correct explanation.
Option $A$ is correct.

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