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Question Bank No: 2

1. Colloidal particles in soap sol carry

a)		Negative charge
b)		Positive charge
c)		No charge
d)		Either positive or negative charge

2. Butter is a colloid containing

a)		Fat disperesed in water
b)		Fat disperesed in oil
c)		Water disperesed in Fat
d)		None of these

3. Size of colloidal particles ranges between

a)		1 nm to 100 nm
b)		1 nm to 1000 nm
c)		10 nm to 1000 nm
d)		100 nm to 1000 nm

4. The migration of collidal particles under influence of an electric field is known as

a)		Electro - osmosis
b)		Brownian movement
c)		Cataphoresis
d)		Dialysis

5. The path of a beam of light through smoke is visible ,because

a)		carbon dioxide in the smoke scatters light
b)		carbon dioxide in the smoke absorbs light
c)		colloidal particles in the smoke absorb light
d)		colloidal particles in the smoke scatter light

6. Milk is an example for

a)		emulsion
b)		gel
c)		sol
d)		gerosol

7. Formation of deltas is attributed to

a)		coagulation of colloidal solution
b)		purification of colloidal solution
c)		formation of colloidal solution
d)		peptisation

8. An emulsifying agent among the following is

a)		water
b)		coconut oil
c)		Kerosene
d)		soap solution

9. Which among the following is an example for homogeneous catalysis?

a)		lead chamber process
b)		hydrolysis of cane sugar
c)		contact process
d)		both a and b

10. Arsenic sulphide sol is subjected to electric field. The migration of colloidal particlescan be termed as

a)		electrophoresis
b)		electro osmosis
c)		anaphoresis
d)		cataphoresis

11. Collodion is a colloidal solution of

a)		collagen
b)		copper
c)		cellulose nitrate
d)		starch in alcohol

12. The conversion of a precipitate into a colloidal solution by adding a suitable electrolyte is called

a)		dialysis
b)		double decomposition
c)		mechanical disintegration
d)		peptisation

13. The path of light through starch solution is clearly visible due to

a)		Brownian movement
b)		Electrophoresis
c)		Electoosmosis
d)		Tyndall effect

14. The incorrect statement about chemisorptions is

a)		$Δ H$ adsorption is high
b)		irreversible
c)		multi molecular layers are adsorbed
d)		specific

15. An example for aerosol is

a)		soap lather
b)		gold sol
c)		butter
d)		smoke

16. For the adsorption of a gas on a solid, the plot of log x/m against log p is a straight line with slop equal to

a)		K
b)		logK
c)		1/n
d)		n

17. Colloidal medicines are more effective because they are

a)		completely exacted from the body
b)		insoluble in blood
c)		soluble in blood
d)		easily assimilated and adsorbed

18. Synthetic detergents belong to the class of

a)		macromolecular colloids
b)		multi molecular colloids
c)		associated colloids
d)		multi atomic colloids

19. The best coagulant for ${As}_{2} S_{3}$ sol is

a)		NaCl
b)		KCl
c)		$K_{4} [Fe {(N)}_{6}]$
d)		$[Co {{(NH}_{3})}_{6}] {Cl}_{3}$

20. ${Fe (OH)}_{3}$ sol obtained by the hydrolysis of ${FeCl}_{3}$ will be having a charge of

a)		Positive
b)		Negative
c)		Neutral
d)		Positive or negative

21. The gold numbers of protective colloids P, Q, R, S and T are respectively 0.25, 0.001, 0.0001, 2.5 and 5.6. The best protective colloid will be

a)		P
b)		T
c)		R
d)		S

22. The movement of dispersion medium under the influence of an electric field is called

a)		Brownian movement
b)		Tyndall effect
c)		Electron osmosis
d)		Electrophoresis

23. Silica gel adsorbs moisture. In this process silica gel and moisture are respectively

a)		adsorbent and adsorbate
b)		adsorbate and adsorbent
c)		dispersed phase and dispersion medium
d)		dispersion medium and dispersed phase

24. The function of gelatin in ice cream is to

a)		improve flavour
b)		soldify the mixture
c)		prevent the formation of colloid
d)		stabilize the colloid

25. Absorption is always

a)		endothermic
b)		exothermic
c)		endothermic or exothermic
d)		endothermic at low temp