Assertion :Electron affinity of fulorine is greater than chlorine. Reason: Ionisation potential of fluorine is less than chlorine.

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 incorrect but Reason is correct

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
The electron affinity of fulorine is smaller than chlorine due to interelectron repulsion in small F atom.
The ionisation potential of fluorine is less than chlorine.
Thus, Assertion and Reason are both incorrect.

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Assertion: The mass of Chlorine is 35.5 u

Reason: For elements having isotopes, the average of mass of its isotopes is considered as the atomic mass of that element.

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