Spectroscopy

Homonuclear diatomic molecules with no permanent dipole moment show

• Vibrational spectroscopy

• Rotational spectroscopy

• Electronic spectroscopy

• NMR

In vibrational analaysis of a band system the energy of the v=--- level is taken as zero

• 0

• 1

• 2

• 3

In V" progression

• V' varies & v" is constant

• V" varies & v' is constant

• Both varies

• None of these

A straight line representing a transition between electronic states will be

• Inclined with x axis

• Inclined with Y axis

• Horizontal

• Vertical

Which of the following molecules is NMR active

• Helium

• Carbon

• Boron

• Oxygen

The type of relaxation in NOE is

• Spin spin

• Spin Lattice

• Dipole Dipole

• Can't b predicted

In general Chemical shift is measured in

• Ppm

• Ppb

• Ppt

• Cm-1

The intensity ratio of the line CHO in CH3-CHO in NMR is

• 1:1

• 1:2:1

• 1:3:3:1

• 1:3:1

The frequency in ESR falls in

• Gamma ray region

• Microwave

• RF

• IR

The hyperfine structure in ESR is due to

• Nuclear spin -spin coupling

• Electron spin-spin coupling

• Both a and b

• Nuclear spin with electronic spi