Surface Chemistry - Online Test

Q1. An example of autocatalysis is
Answer : Option A
Explaination / Solution:

Oxidation of oxalic acid by acidified KMnO4 is example of autocatalysis.
Q2. Decomposition of H2O2 can be prevented in the presence of
Answer : Option D
Explaination / Solution:

Glycerol prevents the decomposition of H2O2

Q3. Liquid – liquid solutions are known as
Answer : Option D
Explaination / Solution:

Dispersed phase and dispersion medium both are liquids.

Q4. Substances that alter the rate of a chemical reaction without being used up in a chemical reaction is known as
Answer : Option D
Explaination / Solution:

Catalyst only increases or decreases the activation energy of a reaction. It doesnot get used up in reaction.

Q5. Enzymes are
Answer : Option A
Explaination / Solution:

Enzymes are biological catalyst, they catalize different chemical reactions in body.

Q6. Fog is a colloidal solution of
Answer : Option A
Explaination / Solution:

Dispersed phase is liquid, dispersion medium is gas.

Q7. The colloidal solution of two immiscible liquids is called
Answer : Option A
Explaination / Solution:

Dispersed phase is liquid, dispersion medium is liquid.

Q8. The basic principle of Cottrell precipitator is
Answer : Option D
Explaination / Solution:

It is used for decreasing air pollution by neutralizing the colloid.

Q9. In which of the following systems, the dispersed phase and dispersion medium are both solid?
Answer : Option A
Explaination / Solution:

It is a Sol type of colloid.

Q10. Ammonia is adsorbed by
Answer : Option A
Explaination / Solution:

Charcoal act as an adsorbent.