Question:
Which is Lewis acid?
Which is Lewis acid?
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Which is Lewis acid?
Updated On: Apr 15, 2026
- $BF_{3}$
- $NF_{3}$
- $Cl^{-}$
- $H_{2}O$
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The Correct Option is A
Solution and Explanation
Step 1: Definition
A Lewis acid is an electron-pair acceptor (electron deficient species).
Step 2: Analysis of $BF_{3$}}
In $BF_{3}$, Boron has only 6 electrons in its valence shell. It is an electron-deficient molecule and can accept an electron pair.
Step 3: Analysis of others
$NF_{3}$, $Cl^{-}$, and $H_{2}O$ all have lone pairs of electrons that they can donate, making them Lewis bases.
Final Answer: (A)
A Lewis acid is an electron-pair acceptor (electron deficient species).
Step 2: Analysis of $BF_{3$}}
In $BF_{3}$, Boron has only 6 electrons in its valence shell. It is an electron-deficient molecule and can accept an electron pair.
Step 3: Analysis of others
$NF_{3}$, $Cl^{-}$, and $H_{2}O$ all have lone pairs of electrons that they can donate, making them Lewis bases.
Final Answer: (A)
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