93.

94.

95.

96.

97.

98.

99.

100.

155/23

Which type of isomerism is exhibited by the coordination complex [Co(NH3)g]
[Cr(CN)g] ?

A) lonisation isomerism B) Geometrical isomerism

C) Linkage isomerism D) Co-ordination isomerism

Which of the following co-ordination complex exhibits optical isomerism ?

A) [Co(en),)°* 8) [0௦4/2 *

௦) [0௦(44),012* 0) [6௦4/9 0094

The selection rule for pure rotational Raman spectrum of a diatomic molecule is
A) AJ=0 B) AJ=0, +1

C) AJ =0, +2 0) AJ =0, +1, +2

Which is a spin-forbidden electronic transition ?
A) Singlet state ‏بب‎ Singlet state B) Singlet state — Triplet state
C) Triplet state < Triplet state D) None of these

The reason for using TMS as reference in NMR is

A) It has 12 equivalent protons

B) It has low boiling point

C) It is chemically inert
)

D) All of these

Thin layer chromatography is based on the principle of
A) adsorption B) partition
C) electrical mobility D) desorption

How many NMR signals will be obtained for ethylacetate molecule in its proton
NMR spectrum ?

A) 1 B) 2 038 D) 4

The number of normal modes of vibration of CO, are
A) 1 B) 2 ©) 3 0) 4