Assertion :All Bronsted bases are Lewis bases. Reason: A species that accepts a proton necessarily should donate a lone pair of electrons.

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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Assertion is incorrect but 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
All Bronsted-Lowry bases must have a lone pair to accept $H^{+}$ ion, and all Lewis bases have lone pairs. However, Lewis bases may act as nucleophiles for any number of atoms; $B$ , $A l$ , $C$ , etc; not just $H$ .
So, all Bronsted-Lowry bases are Lewis bases, but not all Lewis bases are Bronsted-Lowry bases.

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