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Surface Chemistry

Question

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Give one example each of positively charged sol and one example of negatively charged sol:

Solution

Answer:

Fe(OH)₃ is positively charged whereas As₂ ,S₂. is a negatively charged colloid.

Some More Questions From Surface Chemistry Chapter

Why are substances like platinum and palladium often used for carrying out electrolysis of aqueous solutions?

Why does physisorption decrease with the increase of temperature?

Why are powdered substances more effective adsorbents than their crystalline forms?

In Haber's process, hydrogen is obtained by reacting methane with steam in presence of NiO as catalyst. The process is known as steam reforming. Why is it necessary to remove CO when ammonia is obtained by Haber’s process?

Why is the ester hydrolysis slow in the beginning and becomes faster after sometime?

What is the role of desorption in the process of catalysis?

Why is it essential to wash the precipitate with water before estimating it quantitatively?

What is adsorption?

What do you mean by adsorbent and adsorbate?

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