1

IIT-JEE 1994

Subjective
Using the VSEPR theory, identify the type of hybridization and draw the structure of OF2. What are the oxidation states of O and F?

Answer

+2, -1
2

IIT-JEE 1993

Subjective
The dipole moment of KCl is 3.336 $$\times$$ 10-29 Coulomb meters which indicates that it is a highly polar molecule. The interatomic distance between K+ and Cl- in this molecule is 2.6 $$\times$$ 10-10. Calculate the dipole moment of KCl molecule if there were opposite charges of one fundamental unit located at each nucleus. Calculate the percentage ionic character of KCl.

Answer

80.09 %
3

IIT-JEE 1991

Subjective
Arrange the following :

Increasing strength of hydrogen bonding (X-H-X):

O, S, F, Cl, N

Answer

S < Cl < N < O < F
4

IIT-JEE 1988

Subjective
Arrange the following :

N2, O2, F2, Cl2 in increasing order of bond dissociation energy

Answer

F2 < Cl2 < O2 < N2

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