Assertion :The bond angle in BF3 is smaller than that in BF4−. Reason: BF3 has sp2− hybridisation, whereas BF4− has sp3− hybridisation.
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 D Assertion is incorrect but Reason is correct BF3 has angle 1200 while BF−4 has around 1090 angle. Also it can be seen from structure that BF3 has sp2− hybridisation, whereas BF4− has sp3− hybridisation.