MEDIUM
11th CBSE
IMPORTANT
Earn 100

Which one of the following has highest Lewis acid strength?

50% studentsanswered this correctly

Important Questions on Some p-Block Elements

MEDIUM
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q I
The correct statement is 
MEDIUM
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q I
Which of the following are Lewis acids?
MEDIUM
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q I
Which of the following is a Lewis acid?
HARD
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q I
The bond dissociation energy of B—F in BF3 is 646 kJ mol-1 whereas that of C—F in CF4 is 515 kJ mol-1. The correct reason for higher B—F bond dissociation energy as compared to that of C—F is-
MEDIUM
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q I
The correct formula of borax is
EASY
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q I
In borax, the number of B-O-B links and B-OH bonds present are, respectively
HARD
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q I

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

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

EASY
11th CBSE
IMPORTANT
Pradeep's New Course CHEMISTRY Vol.II>Chapter 11 - Some p-Block Elements>Competition Focus>Q I
Boric acid is an acid because its molecule: