Surface Chemistry-II Chemistry Test Series For NEET-2020

Test Preparation on Surface Chemistry-II-Chemistry Test Series For NEET-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.

When excess of electrolyte is added to a colloid it

1Coagulates
2Precipitates
3Gets diluted
4Does not change

4.

The purification of the colloidal particles from crystalloid
dimensions through semipermeable membrane is known as

1Coagulation
2Dialysis
3Ultrafiltration
4Peptisation

5.

Size of colloidal particles varies from

(a) 10^-9 to 10^-7 m
(b) 10^-17 to 10^-9 m
(c) 10^-7 to 10^-5 m
(d) 10^-10 to 10^-4 m

1A
2B
3C
4D

Colloidal particles range between 10^-9 to 10^-7 m or 10^-7
to 10^-5 cm.

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