Assertion :Phosphorous, sulphur and chlorine are electronegative elements of the periodic table. Reason: Phosphorous, sulphur and chlorine have incomplete octet and have tendency to gain electron.

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
Electronegativity is a measure of the attraction of an atom for the electrons in a chemical bond. The higher the electronegativity of an atom, the greater its attraction for bonding electrons.
Phosphorous ,sulphur and chlorine have incomplete octet and have tendency to gain electron so they are electronegative elements.

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