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Question

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


A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
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; $$B$$, $$Al$$, $$C$$, etc; not just $$H$$. 
So, all Bronsted-Lowry bases are Lewis bases, but not all Lewis bases are Bronsted-Lowry bases.

Chemistry

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