NEET Chemistry Surface Chemistry Questions Solved

BOARD

Describe a conspicuous change observed when

(i) a solution of NaCl is added to a sol. of hydrated

ferric oxide.

(ii) a beam of light is passed through a solution of 

NaCl and then through a sol.

(i) Coagulation or precipitation of sol. takes place.

(ii) Scattering of light is observed when light is passed 

through a sol. whereas no scattering of light is observed 

in a solution of NaCl/ Tyndall effect in the sol.

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