Preparation of Lyophilic and Lyophobic Sols NEET Questions

Organic Chemistry - Principles of Practical Chemistry

Preparation of Lyophilic and Lyophobic Sols MCQ Questions


7.
Lyophilic sols are reversible because:
A.
They cannot be coagulated
B.
They have no charge
C.
After coagulation, they can be reconverted to the sol form by simply adding the dispersion medium
D.
They scatter light strongly
😑 View Answer Rough Work Error
ANSWER :
C. After coagulation, they can be reconverted to the sol form by simply adding the dispersion medium
8.
Lyophobic sols are called irreversible because:
A.
They are coloured
B.
They show no Brownian motion
C.
Their particles are small
D.
After coagulation they cannot be redispersed in the dispersion medium by simply adding water
😑 View Answer Rough Work Error
ANSWER :
D. After coagulation they cannot be redispersed in the dispersion medium by simply adding water
9.
Particles in a lyophilic sol are held by:
A.
Gravitational force
B.
Surface charge only
C.
Magnetic attraction
D.
Strong solvation through hydrogen bonding / dipole interactions with the medium
😑 View Answer Rough Work Error
ANSWER :
D. Strong solvation through hydrogen bonding / dipole interactions with the medium
10.
Particles in a lyophobic sol are stabilised primarily by:
A.
Electrostatic repulsion due to similar charges on all particles
B.
Gravity
C.
Solvation of the particles
D.
Hydrogen bonding with water
😑 View Answer Rough Work Error
ANSWER :
A. Electrostatic repulsion due to similar charges on all particles
11.
The viscosity of a lyophilic sol is:
A.
Zero
B.
Much higher than that of the pure dispersion medium
C.
Much lower than that of the pure dispersion medium
D.
Equal to that of the pure dispersion medium
😑 View Answer Rough Work Error
ANSWER :
B. Much higher than that of the pure dispersion medium
12.
The viscosity of a lyophobic sol is:
A.
Always equal to that of a true solution
B.
Much higher than that of the pure dispersion medium
C.
Almost the same as that of the pure dispersion medium
D.
Always zero
😑 View Answer Rough Work Error
ANSWER :
C. Almost the same as that of the pure dispersion medium