Question

BF3 does not have proton but still act as an acid and reacts with NH3

Answer 1

Acc to Lewis, a substance is an acid only when its octet is not complete.

Also, in BF3 its octet is not complete.
Thus, BF3 act as an acid even it is not having a proton.

Hope it will help you
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Answer 2

Acc Lewis, is a substance is an acid only when the octet is not complete.
also, in BF3 its ok this is not complete.
thus, BF3 act as an acid even it is not having a Proton.
please please mark this answer as brainliest OK.