Surface Chemistry  MCQs

MCQs of Surface Chemistry

Showing 21 to 30 out of 203 Questions
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21.
What are enzymes made up of ?
(a) Carbohydrates
(b) Lipids
(c) Vitamin
(d) Proteins
Answer:

Option (d)

22.
If sand is dissolved in water, shaken and kept for some time, the sand settles down. The phenomenon is called :
(a) Colloid solution
(b) True solution
(c) Suspension
(d) Dispersion
Answer:

Option (c)

23.
What is the colloid in which both dispersion medium and dispersed phase are in solid state called ?
(a) Emulsion
(b) Gel
(c) Aerosol
(d) Solid sol
Answer:

Option (d)

24.
Which of the following colloid is reversible ?
(a) Lyophilic
(b) Lyophobic
(c) Hydrophilic
(d) Both (A) and (C)
Answer:

Option (d)

25.
What type of colloid is sulphur (S8) dissolution ?
(a) Associated colloid
(b) Micelle
(c) Multimolecular colloid
(d) Macromolecular colloid
Answer:

Option (c)

26.
Which choice is correct for micelle ?
(a) Is a combination of emulsion and gel
(b) Is an adsorbate catalyst
(c) Is an ideal solution
(d) Is an associate of colloids
Answer:

Option (d)

27.
At a critical micelle concentration, the molecules on the surface _____
(a) Decompose
(b) Associate
(c) Dissociate
(d) Completely soluble
Answer:

Option (b)

28.
What is the correct effective coagulating order of ions for positively charged colloid of Fe(OH)3 ?
(a) PO 43- >CI->SO 42-
(b) PO 43- > SO 42-> CI-
(c) CI- > SO 42-> PO 43-
(d) SO 42-> PO 43-> CI- 
Answer:

Option (b)

29.
Which of the following colloidal sol can not be prepared by Bredig's arc method ?
(a) Sulphur
(b) Silver
(c) Gold
(d) Platinum
Answer:

Option (a)

30.
With which property of colloid Tyndall effect is associated ?
(a) Mechanical
(b) Colligative
(c) Optical
(d) Electrical
Answer:

Option (c)

Showing 21 to 30 out of 203 Questions
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