Single Choice

Alums purify muddy water by :

Adialysis
Babsorption
Ccoagulation
Correct Answer
Dforming true solution

Solution

Stability of the lyophobic sols is due to presence of charge on colloidal particles. If charge is removed, particles come together and settle down. Spontaneous destabilization of solution is ageing and destabilization of solution by artificial means is called coagulation. Alums purify muddy water by coagulation.

SIMILAR QUESTIONS

Surface Chemistry

The dispersed phase in colloidal iron (III) hydroxide and colloidal gold is positively and negatively charged respectively. Which of the following statements is not correct?

Surface Chemistry

Which of the following electrolytes will have maximum coagulating value for $$AgI/Ag^+$$ sol?

Surface Chemistry

How can a lyophilic sol be coagulated?

Surface Chemistry

The coagulation of sol particles may be brought about by:

Surface Chemistry

The ability of an ion to bring about coagulation of given colloid depends upon

Surface Chemistry

Equal volume each of two sols of $$AgI$$, one obtained by adding $$AgNO_3 $$ to slight excess of $$KI$$ and another obtained by adding $$KI$$ to slight excess of $$AgNO_3$$ are mixed together . Then :

Surface Chemistry

Which of the following electrolytes will have maximum coagulating value for $$AgI/Ag^+$$ sol?

Surface Chemistry

The clouds consists of charged particles of water dispersed in air. Some of them are positively charged, others are negatively charged. When positively charged clouds come closer, they cause lightening and thundering whereas when positive and negative charged colloids come closer, they cause heavy rain by aggregation of minute particles. It is possible to cause artificial rain by throwing electrified sand or silver iodide from an aeroplane and thus, coagulation the mist hanging in air. AgI helps in artificial rain because :

Surface Chemistry

Alum helps in purifying water by

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