HARD
11th CBSE
IMPORTANT
Earn 100

The tendency of BF3, BCl3 and BBr3 to behave as Lewis acid decreases in the sequence-

50% studentsanswered this correctly

Important Questions on Some p-Block Elements

MEDIUM
11th CBSE
IMPORTANT
Which one of the following has highest Lewis acid strength?
MEDIUM
11th CBSE
IMPORTANT
Which of the following are Lewis acids?
MEDIUM
11th CBSE
IMPORTANT
Which of the following is a Lewis acid?
HARD
11th CBSE
IMPORTANT
The bond dissociation energy of BF in BF3 is 646 kJ mol-1 whereas that of CF in CF4 is 515 kJ mol-1. The correct reason for higher BF bond dissociation energy as compared to that of CF is-
MEDIUM
11th CBSE
IMPORTANT
The correct formula of borax is
EASY
11th CBSE
IMPORTANT
In borax, the number of B-O-B links and B-OH bonds present are, respectively
HARD
11th CBSE
IMPORTANT

2B(OH)3 + 2NaOH  NaBO2 + Na[B(OH)4] +2H2O

How can this reaction be made to proceed in forward direction?