30
MCQ (Multiple Correct Answer)
Which of the following statements are correct?
A
Mixing two oppositely charged sols neutralises their charges and stabilises the colloid
B
Presence of equal and similar charges on colloidal particles provides stability to the colloids
C
Any amount of dispersed liquid can be added to emulsion without destabilising it
D
Brownian movement stabilises sols
31
MCQ (Multiple Correct Answer)
An emulsion cannot be broken by ........... and ........... .
A
heating
B
adding more amount of dispersion medium
C
freezing
D
adding emulsifying agent
32
MCQ (Multiple Correct Answer)
Which of the following substances will precipitate the negatively charged emulsions?
A
KCl
B
Glucose
C
Urea
D
NaCl
33
MCQ (Multiple Correct Answer)
Which of the following colloids cannot be coagulated easily?
A
Lyophobic colloids
B
Irreversible colloids
C
Reversible colloids
D
Lyophilic colloids
34
MCQ (Multiple Correct Answer)
What happens when a Lyophilic sol is added to a Lyophobic sol?
A
Lyophobic sol is protected
B
Lyophilic sol is protected
C
Film of lyophilic sol is formed over lyophobic sol
D
Film of Iyophobic sol is formed over Iyophilic sol