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CRYSTAL FIELD THEORY

Total questions: 10

Worksheet time: 6mins

Name
Class
Date
1.

WHAT WAS THE METAL ION INVOLVED IN THE EARLY STUDIES OF CRYSTAL FIELD THEORY?

a)

Co(III)

b)

Co(II)

c)

Ni(II)

d)

Cu(II)

2.

WHICH OF THE FOLLOWING COMPOUND HAS TWO ISOMERS?

a)

CoCl3.6NH3

b)

CoCl3.5NH3

c)

CoCl3.4NH3

d)

ALL OF THE ABOVE

3.

IN OCTAHEDRAL SYMMETRY, THE LOW LYING d ORBITALS ARE?

a)

t2

b)

e

c)

t2g

d)

eg

4.

IN TETRAHEDRAL SYMMETRY, WHAT ARE THE HIGHER ENERGY ORBITALS?

a)

t2g

b)

t2

c)

eg

d)

e

5.

Δt= ?

a)

2/3 Δo

b)

4/9 Δo

c)

4/9 Δsp

d)

NONE OF THE ABOVE

6.

CRYSTAL FIELD STABILIZATION ENERGY FOR [CoF6]3- ?

a)

0.4 Δo - P

b)

1.4 Δo

c)

2.4 Δo - 3P

d)

0.4 Δo

7.

CRYSTAL FIELD STABILIZATION ENERGY FOR [CoCl4]2- ?

a)

0.2 Δ

b)

0.4 Δ

c)

1.2 Δ - 2P

d)

1.2 Δ

8.

ENERGY ORDER OF THE ORBITALS IN TETRAGONALLY ELONGATED LIGAND FIELD?

a)

eg, a1g, b1g, b2g

b)

eg, b2g, a1g, b1g

c)

a1g, b1g, b2g, eg

d)

NONE OF THE ABOVE

9.

JAHN TELLER ACTIVE CONFIGURATION ARE ?

a)

d5

b)

d7

c)

d3

d)

d8

10.

DYNAMIC JAHN TELLER DISTORTION IS SEEN IN ?

a)

[ Cu(NO2)6 ] 4-

b)

[ Cu(NO3)6 ] 4-

c)

[ Co(NO2)6 ] 4-

d)

[Cu(NO3)6 ] 3-