Entry Test MCQ :: Chemical Equilibrium

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Which of following is not a base

[A].	KOH	[B].	NH3
[C].	PH3	[D].	BF3

Answer: Option D

dia said:

why BF3 is not a base .plz tell me with reason and why NH3 and PH3 are bases

iQra muSHTAQ said:

bf3 is an acid while nh3 is a weak base nd ph3 is also a base