Chemistry quiz Group 10

According to the selection rule, in the rotational spectrum of diatomic molecule the condition for allowed transition is…………

• µ=0, J= ±0

• µ=0, J= ±1

• µ≠0, J= ±0

• µ≠0, J= ±1

The rotational constant (B) will be………………. with replacement of one of the atom with its isotope with higher atomic mass.

• Increases

• decreases

• become Zero

• constant

Which of the following transitions are occurs for "P" Branch?

• V=+1, J=-1

• V=+1, J=+1

• V=-1, J=-1

• V=-1, J=+1

The number of modes of vibrations for non-linear molecule is determined by formula…………..

• 3n-4

• 3n-5

• 3n-6

• 4n-5

In anharmonic Oscillator, the band observed due to transition taking place from v=0 to v=1 is called……………….

• Fundamental Band

• First Overtone band

• Second Overtone

• Third Harmonic

BET equation is used to determine the ……………. of adsorbent powders.

• Surface tension

• colour

• Particle size

• Surface area

…………. is an example of colloidal system where a liquid is dispersed phase and solid is dispersion medium.

• sol

• gel

• emulsion

• Solid sol

The particle size of colloidal particles is in the range of …………

• 1nm - 10 nm

• 1mm - 100 mm

• 1nm - 100 nm

• 10 nm - 100mm

The type II adsorption isotherm has a …............ point' B' which represents the pressure at which formation of monolayer is completed.

• critical

• Equivalent

• Saturation

• transition

A plot of Freundlich adsorption isotherm gives a straight line with slope equal to…........

• n

• 1/n

• log K

• log n