Important Questions of Surface Chemistry Chemistry | Zigya

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

Advertisement
11.

Peptisation involves

  • precipitation of colloidal particles

  • disintegration of colloidal aggregates

  • evaporation of dispersion medium

  • impact of molecules of the dispersion medium on the colloidal particles


12.

In Langmuir's model of adsorption of a gas on a solid surface,

  • the rate of dissociation of adsorbed molecules from the surface does not depend on the surface covered

  • the adsorption at a single site on the surface may involve multiple molecules at the same time

  • the mass of gas striking a given area of surface is proportional to the pressure of the gas

  • the mass of gas striking a given area of surface is independent of the pressure of the gas


13.

Which one of the following is most effective in causing the coagulation of an As2S3 sol?

  • KCl

  • AlCl3

  • MgSO4

  • K3Fe(CN)6


14.

The continuous phase contains the dispersed phase throughout, example is

  • water in milk

  • fat in milk

  • water droplets in mist

  • oil in water


Advertisement
15.

Peptization denotes

  • digestion of food

  • hydrolysis of proteins

  • breaking and dispersion into colloidal state

  • precipitation of solid from colloidal dispersion


16.

Blue colour of water in sea is due to

  • refraction of blue light by impurities

  • refraction blue sky by water

  • scattering of light by water

  • None of the above


17.

Freundlich adsorption isotherm is

  • xm=kp1/n

  • x=mkp1/n

  • xm=kp-n

  • All of these


18.

In ...... process, work is done at the expense of internal energy.

  • isothermal

  • isochoric

  • adiabatic

  • isobaric


Advertisement
19.

Haber process is used for the production of which of the following?

  • NH3

  • HNO3

  • H2SO4

  • O3


20.

Which of the following is not true about a catalyst?

  • Mechanism of the reaction in presence and absence of catalyst could be different.

  • Use of catalyst cannot change the order of the reaction

  • Catalyst enhances both forward and backwards reaction at equal rate.

  • Catalyst participates in the reaction, but not consumed in the process.


Advertisement