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Which of the following ions can cause coagulation of proteins ?
Proteins are coagulated by some heavy metal ions like Ag+, Hg2+ and Pb2+.
Surface tension of lyophilic sols is
Surface tension of lyophilic sols is lower than water(dispersion medium).
Hair cream is an example of
Emulsions are liquid-liquid colloidal systems, Generally one of the two liquids is water.
Commonly used catalyst in the preparation of acrylonitrile from propylene, ammonia and oxygen is
Bismuth cerium molybdate catalysts promoted with alkali metal and other optional ingredients provide high yields of acrylonitrile in the ammoxidation of propylene.
Butter is a colloid formed when
In butter (liquid - solid) water is dispersed in fat.
Milk is a colloid in which a
Milk is a emulsion in which liquid is dispersed in liquid.
Small liquid droplets dispersed in another liquid is called
When the dispersed phase and dispersion medium both are liquid, the colloidal system is called as an emulsion like milk, vasnishing cream etc.Option (c) is correct.
The cause of Brownian movement is
It is due to impact of molecules of dispersion medium on the colloidal particles.
Which one of the following statements is incorrect in the case of heterogeneous catalysis ?
The theory of heterogeneous catalysis is based upon the phenomenon of adsorption.The activity of catalyst is due to the presence of free valencies on its sufrace due to which surface of catalyst has force of attraction.
Which of the following forms cationic micelles above certain concentration?
Cetyl trimethyl ammonium bromide,[C16H33(CH3)3N+Br-] is a cationic micelle.