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Alum helps in purifying water by...

Alum helps in purifying water by

A

forming silicon complex with clay particles

B

sulphate part which combines with dirt and removes it

C

aluminium which coagulates the mud particles

D

making mud water soluble.

Text Solution

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Alum helps in purifying water by `Al^(3+)` ions which coagulate the negative mud particles.
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MODERN PUBLICATION-SURFACE CHEMISTRY-COMPETITION FILE (OBJECTIVE TYPE QUESTIONS) (A. MULTIPLE CHOICE QUESTIONS WITH ONLY ONE CORRECT ANSWER)
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  2. The enthalpy of physical adsorption is about

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  5. The presence of electric charge on colloidal particles is indicated by...

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  6. The process of separation of colloids by passing through semi permeabl...

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  7. Size of colloidal particles is

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  8. An example of micelle is:

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  9. Effective electrolyte to cause the flocculation of a negatively charge...

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  10. Colloidal particles exhibit Tyndall effect due to

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  11. Which of the following is most effective in causing the coagulation of...

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  12. Soaps essentially form a colloidal solution in water and remove the gr...

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  13. Which of the following is an example of associated colloid ?

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  14. Which type of property is the Brownian movement of colloidal sol?

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  15. When KI is added to silver nitrate solution, the sol formed may be wri...

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  16. Out of the following, which reaction gives rise to a colloidal sol:

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  17. Blue colour of water in sea is due to

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  18. Alum helps in purifying water by

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  19. The coagulation power of an electrolyte for As(2) S(3) decreases in th...

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  20. The volume of a colloidal particle VC as compared to the volume of a s...

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