Adsorption isotherm

Freundlich adsorption isotherm applicable for

• Lower pressure

• Higher pressure

• Low pressure

• Highest pressure

The substance that concentrates at the surface ____ & The solid on whose surface the concentration occurs____

• Absorbate & adsorbent

• Adsorbent & adsorbate

• Adsorbent & absorbate

• Adsorbate & adsorbent

Freundlich adsorption isotherm gives a straight line at

• Low temperature and high pressure

• Low temperature and low pressure

• High temperature and low pressure

• High temperature and high pressure

Which gas/ gases are adsorbed more on the surface and what is the reason for that

• Chlorine; intermolecular force lower than permanent gas

• Nitrogen;van der Waals force involved higher than chlorine

• Ammonia;van der Waals force is higher than permanent gas

• Both chlorine and ammonia

Gas adsorption depends on

• Temperature and pressure

• Equilibrium temperature

• Equilibrium temperature and pressure

• None of the above

Which adsorption isotherm states that only monolayer is formed by adsorbed molecule

• Freundlich adsorption isotherm

• Langmuir adsorption isotherm

• Both of the above

• None of the above

The correct Freundlich equation

• Log k/m =log k+ 1/n log P

• Log x/m =log w+ 1/n log P

• Log w/m =log k+ 1/n log T

• Log w/m =log k+ 1/n log P

The effect of temperature on the extent of adsorption at a given pressure is called

• Adsorption isotherm

• Adsorption isobar

• Adsorption isostere

• None of the above

The process of adsorption is

• Exothermic

• Endothermic

• Endothermic as well as exothermic

• None of the above

In freundlich equation, 1.k and n are constants 2. It does not depends on the nature of the gas and adsorbent

• Both the statements are correct

• Statement 2 only correct

• Statement 1 only correct

• Both the statements are incorrect