Surface Chemistry - Online Test
Q1. Liquid – liquid solutions are known as
Answer : Option D
Explaination / Solution:
Dispersed phase and dispersion medium both are liquids.
Q2. Flocculation value is expressed in terms of
Answer : Option A
Explaination / Solution:
Fact
Q3. In aerosol the dispersion medium is
Answer : Option C
Explaination / Solution:
Dispersion medium is gas.
Q4. Enzymes are
Answer : Option B
Explaination / Solution:
Enzymes are biological catalyst, they catalize different chemical reactions in body.
Q5. A biochemical catalyst is
Answer : Option C
Explaination / Solution:
Enzymes are biological catalyst, they catalize different chemical reactions in body.
Q6. The number of phases in colloidal system are
Answer : Option A
Explaination / Solution:
Dispersed phase, dispersion medium
Q7. The process of separation of colloids by passing through semi permeable membrane is called
Answer : Option C
Explaination / Solution:
Dialysis we use, salt solution of approximately same concentration outside the artificial blood capillary, so that urea comes out of the blood, but other useful substances like NaCl , blood cell etc does not. Blood is a colloid.
Q8. Liquid – liquid sols are known as
Answer : Option B
Explaination / Solution:
Liquid in liquid sols are emulsions
Q9. Whipped cream is an example of
Answer : Option D
Explaination / Solution:
Whipped cream is example of foam.
Q10. Which among the following substances is an example of multimolecular colloids?
Answer : Option A
Explaination / Solution:
Multimolecular colloids are formed when a large number of atoms or molecules of a substance aggregate together to form speices having size in colloidal range. sulphur sol contains a thousand of S8 molecules.
