Organic Conducting Polymers and Origin of spectrum MCQs

By: Prof. Dr. Fazal Rehman | Last updated: November 27, 2024

1. Conducting polymers that are having conjugation are always a type of intrinsically conducting polymers.

(A). False
(B). True
(E). None of these

Multiple Choice Question Answer: b

2. Not true for the intrinsically conducting polymers is ________.

(A). Good storage stability
(B). Poor mechanical strength
(C). Imporcessability
(D). Low conductivities
(E). None of these

Multiple Choice Question Answer: a

3. We always use the Emeraldine base form of polyaniline as a resist for the lithography.

(A). False
(B). True
(E). None of these

Multiple Choice Question Answer: b

4. Which of the following is Bakelite?

(A). Solid
(B). Gas
(C). Gel
(D). Liquid
(E). None of these

Multiple Choice Question Answer: a

5. Which of the following is the advantage of using conducting polymers in place of metals?

(A). Cost
(B). Solubility
(C). Thermal conductivity
(D). Light-weight
(E). None of these

Multiple Choice Question Answer: d

6. The energy of a photon is given by which of the following?

(A). 1/hν
(B). hν
(C). ν/h
(D). 1/hν
(E). None of these

Multiple Choice Question Answer: b

7. The Absorption spectrum results when an electron in an atom undergoes a transition from which of the following?

(A). Lower energy level to a higher one
(B). Higher energy level to a lower one
(C). Intermediate levels
(D). All of these
(E). None of these

Multiple Choice Question Answer: a

8. Which of the following spectra can be broadly classified into two categories?

(A). None of these
(B). Atomic and electronic spectra
(C). Molecular and electronic spectra
(D). Atomic and molecular spectra
(E). None of these

Multiple Choice Question Answer: d

9. The necessary condition for absorption spectrum is that hν should always be __________.

(A). Equal to the energy difference
(B). Smaller than the energy difference
(C). Greater than the energy difference
(D). None of these
(E). None of these

Multiple Choice Question Answer: a

10. Which of the following is the energy level with lower energy?

(A). Excited-state energy level
(B). Initial state energy level
(C). Ground state energy level
(D). All of these
(E). None of these

Multiple Choice Question Answer: c

11. Which of the following is the analysis of electromagnetic radiation scattered, absorbed, or emitted by the molecule?

(A). Kaleidoscopy
(B). Astronomy
(C). Anatomy
(D). Spectroscopy
(E). None of these

Multiple Choice Question Answer: d

12. Spectroscopy deals with the transition that a molecule always undergoes on the absorption of suitable radiations, which are determined by quantum mechanical selection rules.

(A). False
(B). True
(E). None of these

Multiple Choice Question Answer: b

13. In atomic spectroscopy, just the electronic transitions are involved in it.

(A). False
(B). True
(E). None of these

Multiple Choice Question Answer: b

14. We use __________ to make rechargeable batteries.

(A). Polyaniline
(B). Polyester
(C). Polypyrrole
(D). Polyacrylonitrile
(E). None of these

Multiple Choice Question Answer: a

15. The precipitate is dried under vacuum at 60-80°C for which of the following?

(A). 8 hours
(B). 2 hours
(C). 5 hours
(D). 1 hour
(E). None of these

Multiple Choice Question Answer: a

16. Which of the following is the color of the emeraldine salt that is obtained?

(A). Copper tint
(B). Green
(C). Blue-green
(D). Light blue
(E). None of these

Multiple Choice Question Answer: b

17. Not an application of conducting polymers is __________.

(A). Rechargeable batteries
(B). Adhesives
(C). Electronics
(D). Analytical sensors
(E). None of these

Multiple Choice Question Answer: b

18. During the polymerization of polyaniline, which of the following is the sequence of the color change?

(A). Green — copper tint — blue-green — light blue
(B). Blue-green — green — light blue — copper tint
(C). Copper tint — blue-green — green — light blue
(D). Light blue — blue-green — copper tint — green
(E). None of these

Multiple Choice Question Answer: d

19. The final washings of the salt are done with which of the following?

(A). Distilled water
(B). Methanol
(C). Diethyl ether
(D). Acetone
(E). None of these

Multiple Choice Question Answer: c

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