Surface Chemistry-II Chemistry Test Series IIT JEE

Test Preparation on Surface Chemistry-II-Chemistry Test Series IIT JEE-2020

1.

If the dispersed phase is a liquid and the dispersion medium is a solid, the colloid is known as

1A sol
2An emulsion
3A gel
4A foam

2.

Gold number is a measure of the-

1Protective action by a lyophilic colloid on a lyophobic colloid
2Protective action by a lyophobic colloid on a lyophilic colloid
3Number of mg of gold in a standard red gold sol
4Stability of gold sol

3.

Size of colloidal particles varies from

110-9 to 10-7 m
210-17 to 10-9 m
310-7 to 10-5 m
410-10 to 10-4 m

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