Short Answer Type

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Tyndall effect is due to?


Answer:


when we pass a beam of light through the colloidal solution tyndall effect shows.
tyndall effect is due to the fact that colloidal particles scatter light in all direction in space.

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Define enthalpy of adsorption.
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State one difference betwen an emulsion and a sol.
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Multiple Choice Questions

The blue colour of water in the sea is due to
  • Refraction of the blue light by the impurities in sea water.
  • Reflection of blue sky by sea water.
  • Scattering of blue light by water molecules.
  • Absorption of other colours except blue colour by water molecules.
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Short Answer Type

What is the cause of Brownian movement observed in colloidal solution?
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Multiple Choice Questions

The sky looks blue due to
  • dispersion effect 
  • Reflection
  • Transmission
  • Scattering
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The Brownian motion is due to
  • Temperature fluctuation within the liquid phase
  • Attraction and repulsion between charges on the colloidal particles
  • Impact of molecules of the dispersion medium on the colloidal particles
  • Convection currents
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Short Answer Type

How can colloidal solution of sulphur in water be prepared?
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Out of NH3 and N2 which gas will be adsorbed more readily on the surface of charcoal and why?
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Multiple Choice Questions

According to Langmuir absorption isotherm, the amount of gas adsorbed at very high pressures
  • reaches a constant limiting value
  • goes on increasing with pressure
  • goes on decreasing with pressure
  • increases first and decreases later with pressure
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