Question

Which of the following is a Lewis base (a) H2O (b) ALCL3 (c ) BF3

Answer 1

H2O is a Lewis base as it is a electron pair donar.


Hope it helps you!!

Answer 2

a lewis base is any substance which is capable of donating electron pair..
since $AlCl_{3}$ and $BF_{3}$ do not have any electron pair to donate..
while H2O has the free electron pair to donate so it will behave as a lewis base