Surface Chemistry  MCQs

MCQs of Surface Chemistry

Showing 181 to 190 out of 203 Questions
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181.
Which of the following emulsion will be favoured in the presence of Na-metal atom containing soap as an emulsifier ? (P) Butter (Q) Vanishing cream (R) Milk (S) Cold cream
(a) (P) and (S)
(b) (R) and (S)
(c) (Q) and (R)
(d) only (R)
Answer:

Option (c)

182.
Which of the following sols is prepared by Bredig arc method and reduction method ?
(a) S
(b) As2S3
(c) Au
(d) Fe(OH) 3
Answer:

Option (c)

183.
Select the correct pair.
(a) Emulsion – smoke
(b) Gel – butter
(c) Aerosol – hair cream
(d) Solid sol – vanishing cream
Answer:

Option (b)

184.
Rubber is a ____ colloid.
(a) multi – molecular
(b) associated
(c) lyophilic
(d) lyophobic
Answer:

Option (c)

185.
By which of the following methods, Sulphur sol can be prepared ?
(a) Exchange of solvent
(b) Dissolution
(c) All the given three options
(d) Oxidation
Answer:

Option (c)

186.
3 g of activated charcoal was added to 50 ml of acetic acid solution (0.06 N) in a flask. After an hour it was filtered and the strength of the filtrate was found to be 0.042 N. The amount of acetic acid adsorbed (per gram of charcoal) is _____ .
(a) 18 mg
(b) 36 mg
(c) 42 mg
(d) 54 mg
Answer:

Option (a)

187.
In which type of adsorption van der Waals' attraction forces play the role ?
(a) Molecular
(b) Physical
(c) Chemical
(d) Physical and chemical
Answer:

Option (b)

188.
How many are the types of adsorption isotherm curves ?
(a) 2
(b) 3
(c) 4
(d) 5
Answer:

Option (d)

189.
Which values are obtained from the intercept obtained in the graph of Freundlich adsorption isotherm ?
(a) a and b
(b) n and K
(c) 1a
(d) log K
Answer:

Option (d)

190.
In how many types the colloidal systems are classified ?
(a) 4
(b) 6
(c) 2
(d) 8
Answer:

Option (d)

Showing 181 to 190 out of 203 Questions
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