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
20
MCQ (Single Correct Answer)
The values of colligative properties of colloidal solution are of small order in comparison to those shown by true solutions of same concentration because of colloidal particles .............. .
A
exhibit enormous surface area
B
remain suspended in the dispersion medium
C
form lyophilic colloids
D
are comparatively less in number