17.
18.

19.
20.
21.
22.

23.
24.

25.
26.
27.
28,
29.
30.

31.
32.

33.
34.

2 a?
rey of an ionic compound *

What are the factors which affect the lattice ené

What is meant by polar covalent bond ?
PCI; is a reactive molecule. Explain. ಟ್‌ ಟ್‌ calculate its bond order.
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Write the molecular orbital configuration of 02
ments in the increasing Order

Write the resonance structures of nitrate ion.

What is electronegativity ? Arrange the following ele
electronegativity. F, Cl, Br, I.
y ‏و‎ (10 x 2 = 20man,

Section C

Answer any five questions.
Each question carries 6 marks

What are Laplacian and Hermitian operators ? Explain.
Calculate the ground state energy of an electron in a 1D box of side Inm. (mass of electron = 9.1;
10-22 kg ; A = 6.626 x 10-4 Js. Also calculate the wavelength corresponds to spectral transition

between the n = 1 and n = 2 levels.
Explain the terms eigen value and eigen function.

Define ionization enthalpy of an element. What are the factors affecting it ?
Explain the shape of BCI, molecule on the basis of VSEPR theory.

Draw the MO energy diagram for CO molecule.Calculate the bond order.

Distinguish between bonding and antibonding molecular orbitals.
Write any two applications of dipolemoment measurement for determining molecular structure.

Explain with examples.
(5 x 6 = 30 marks)

Section D

Answer any two questions.
Each question carries 10 marks
What are quantum numbers ? Discuss the significance of each quantum number.
Explain the terms screening effect and effective nuclear charge. Give the Slaters rule and discuss

its application.
Illustrate Born-Haber cycle with an example. What are its applications ?
on the properties of

What is a hydrogen bond ? What are the effects of hydrogen bonding
compounds ? Distinguish between inter and intra molecular hydrogen bonds with suitable examples.

Describe the unique properties of water on the basis of hydrogen bond. -
(2 x 10 = 20 marks)