15
MCQ (Single Correct Answer)
Which of the following will show Tyndall effect?
A
Aqueous solution of soap below critical micelle concentration
B
Aqueous solution of soap above critical micelle concentration
C
Aqueous solution of sodium chloride
D
Aqueous solution of sugar
16
MCQ (Single Correct Answer)
Method by which lyophobic sol can be protected.
A
By addition of oppositely charged sol
B
By addition of an electrolyte
C
By addition of lyophilic sol
D
By boiling
17
MCQ (Single Correct Answer)
Freshly prepared precipitate sometimes gets converted to colloidal solution by ........... .
A
coagulation
B
electrolysis
C
diffusion
D
peptisation
18
MCQ (Single Correct Answer)
Which of the following electrolytes will have maximum coagulating value for $\mathrm{Ag} / \mathrm{Ag}^{+}$ sol?
A
$\mathrm{Na}_2 \mathrm{S}$
B
$\mathrm{Na}_3 \mathrm{PO}_4$
C
$\mathrm{Na}_2 \mathrm{SO}_4$
D
NaCl
19
MCQ (Single Correct Answer)
A colloidal system having a solid substance as a dispersed phase and a liquid as a dispersion medium is classified as ............ .
A
solid sol
B
gel
C
emulsion
D
sol