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1. Margarine is an emulsion of ..

a. oil in water c. water in a protein e. fat in water

b. water in oil d. a protein in oil

2. Fog is a colloidal system of .

a. gas in liquid c. gas in other gas e. liquid in other liquid

b. liquid in gas d. gas in solid

3. Among of the following substances, the one that cannot form lyophobic colloid if it is dispersed

into water is .a. starch b. sulfur c. gelatin d. soap e. agar

. !ubstances below which is not an e"ample of colloidal system is ..a. mil# c. smo#e e. hydrochloric acid

b. coconut squee$e d. protoplasm

%. An e"ample of colloid the dispersing medium of which is solid and the dispersed phase of which isliquid is .

a. smo#e b. cloud c. brass d. gem e. floatable roc#

&. 'he symptom or process which is most has no relation to colloidal system is ..

a. 'yndall effect c. coagulation e. electrolysis

b. dialysis d. emulsion

(. An electrolytic solution which is effecti)e for coagulating As2!3sol which is negati)ely charged is

a. *a+l b. 2!- c. +a+l2 d. !r+l2 e. Al+l3

. 'he process of purifying water using alum relates to a colloid property, that is

a. /rownian motion c. 'yndall effect e. adsorption

b. electrophoresis d. coagulation

0. ight can loo# when it passes a colloidal system, it is because of the following colloid property, that

is ..a. /rownian motion c. coagulation e. dialysis

b. electrophoresis d. 'yndall effect

1. -ne important property of a colloidal dispersion which is widely used in industrial sector and

analytical biochemistry ..

a. electrophoresis principle c. /rownian motion e. pepti$ation

b. 'yndall effect d. homogeni$ation

11. Agar added in ma#ing ice cream function as ..

a. cooler colloid c. dispersi)e colloid e. ionic agent colloidb. protecti)e colloid d. separator colloid

12. hen coconut oil is mi"ed with water, two layers which do not dissol)e each other are produced.An emulsion will be produced when this mi"ture is sha#en and added by ..

a. hot water b. ice c. soap water d. #erosene e. salt solution

13. A colloidal dispersion can be purified by a method of .a. crystalli$ation c. dialysis e. e)aporation

b. ultramicroscope d. distillation

1. 4lectrodialysis done to a colloidal system is used for ..

a. separating #inds of the colloid5s particles

b. coagulating the colloid5s particlesc. measuring dimension of the colloid5s particles

d. remo)ing the e"cess of electrolytic ions from the colloid

e. ma#ing a solution from the colloid

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1%. 'he e"cess in electrolytes in a colloidal dispersion is often remo)ed by a method of .

a. electrolysis c. dialysis e. precipitation

b. electrophoresis d. decarboni$ation

1&. -ne e"ample of lyophilic colloids is .

a. 6am b. gelatin c. smo#e d. dew e. floatable roc#

1(. As2!3is a hydrophobic colloid which is negati)ely charged. 'he best solution for coagulating this

colloid is ..

a. potassium phosphate c. barium nitrate e. iron 7889 sulfateb. magnesium sulfate d. iron 78889 chloride

1. :i)en that the following phenomena.719. ;elta formation at estuary of a ri)er

729. 'able sugar purification

739. ;iarrhea treatment using norite

79. ater purification'hese are e"amples of colloid coagulation phenomena, except.

a. 1 and 2 b. 1 and 3 c. 1 and d. 2 and 3 e. 2 and

10. Among of methods of ma#ing colloid, which one is the dispersion method .

a. sulfur sol production by flowing