Micelles and Molecular Aggregation MCQs Questions Answers

1. The part of the stearate ion that is hydrophilic in nature is ____

(A) Head

(B) Hydrocarbon chain

(C) Tail

(D) None of these

2. The molecular formula of the stearate ion is _____

(A) C35H17COO+

(B) C35H17COO–

(C) C17H35COO–

(D) C17H35COO+

3. What happens to the number of molecules in a conduction band?

(A) Increases with a rise in temperature

(B) Decreases with a rise in temperature

(C) Increases with a fall in temperature

(D) Does not depend upon the temperature

4. In water, non-polar molecules tend to aggregate because they are forced to come into close proximity with one another due to which of the following?

(A) Vander Waals interactions

(B) Hydrophilic interactions

(C) Hydrophobic interactions

(D) Electrovalent interactions

5. The metallic bonds are non-directional due to _____

(A) There is no change in inter-kernel distance

(B) There is always a non-uniform distribution of the mobile valence electrons around its kernels

(C) There is a change in inter-kernel distance

(D) There is always a uniform distribution of the mobile valence electrons around its kernels

6. Which of the following is the number of stearate ions required to form a micelle of colloidal size?

(A) 50

(B) 60

(C) 70

(D) 80

7. The correct statement is that the soap micelle is _____

(A) Stable because of the negative charge on its head

(B) Stable because of the positive charge on its head

(C) Unstable because of the positive charge on its head

(D) Unstable because of the negative charge on its head

8. The type of molecules that forms the aggregate through a self-assembly process which is driven by the hydrophobic effect is _______

(A) Electrophilic

(B) None of these

(C) Nucleophilic

(D) Ambiphilic

9. Which of the following is the conductivity of micelles?

(A) Equals to a colloidal solution

(B) Lower than a colloidal solution

(C) Higher than a colloidal solution

(D) None of these

10. Which of the following is the process by which individual molecules form the defined aggregate?

(A) Self-aggregation

(B) Aggregation

(C) Self-assembly

(D) Assembly

11. Which of the following is the major cause of molecular aggregation?

(A) Inter-molecular interactions

(B) Induction

(C) Conduction

(D) Resonance

12. Not a state of aggregation of matter is ________

(A) Solid

(B) None of these

(C) Plasma

(D) Liquid and Gas

13. The inter-molecular interaction originates from the _____

(A) Electric properties of atoms

(B) Cohesive properties of atoms

(C) Magnetic properties of atoms

(D) None of these

14. When do the micelles behave as colloids?

(A) They always behave as colloids

(B) Concentration is equal to CMC

(C) Concentration is less than CMC

(D) Concentration is greater than CMC

15. Which of the following is the transition of ions to micelle?

(A) Irreversible

(B) Reversible

(C) All of these

(D) None of these

16. _________ is water-insoluble

(A) COO–

(B) C17H35

(C) Na+

(D) All of these