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Count the number of correct statements.
(a) Minim.um potential required for electrophoresis is called zeta potential
(b) Tyndall effect increases with increase in diff erence in size of particle and wavelength of light used.
(c) Minimum amount of electrolyte in millimoles per 100 ml required to cause precipitate in two hours is called coagulating value.
(d) Both physical and chemical adsorption decreases with temperature
(e) Chemical bonds may be covalent or ionic in chemical adsorption
(f) Zeolites are shape-selective catlalyst.

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answer is 2.

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Detailed Solution

Chemical bonds may be covalent or ionic in chemical adsorption due to the substantial sharing of electrons between the surface of adsorbent and adsorbate.

Zeolites are good shape-selective catalysts because of their honeycomb-like structures.

As a result (e) and (f) are correct.

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