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Physical Chemistry – MCQ – For W.B.C.S. Preliminary Examination 2021.
By Dipayan Ganguly, WBCS Gr A.Continue Reading Physical Chemistry – MCQ – For W.B.C.S. Preliminary Examination 2021.
1. The process in which carbonated ores are changed into oxides in presence of limited air supply is called ____
a. Roasting
b. Calcination
c. Corrosion
d. Reduction
2. Philosopher’s wool is___
a. Zinc Oxide
b. Zinc Carbide
c. Zinc nitrate
d. Zinc Sulphate
3. Which of the following is also known as Stranger gas?
a. Helium
b. Neon
c. Xenon
d. Argon
4. Which of the following is used for etching of glass?
a. Diamond
b. Hydrofluoric acid
c. Both a & b
d. Neither of them
5. Metallic oxides are generally___
a. Acidic
b. Neutral
c. Either acidic or neutral
d. Alkaline
6. Ionic compounds are poor conductors of electricity in the___
a. Molten state
b. Solid state
c. Dissolve state
d. Either a or c
7. One or more new elements or compounds are formed during___
a. Chemical change
b. Physical change
c. Either Physical or Chemical change
d. Neither of them
8. Rubber handgolves that are used by power grid workers are____
a. Galvanized
b. Sanitized
c. Vulcanized
d. Oxidized
9. Which of the following metals provide colour to fireworks?
a. Calcium
b. Uranium
c. Strontium
d. Molybdenum
10. Aqueous solution of copper sulphate is____
a. Alkaline
b. Basic
c. Neutral
d. Acidic
11. In the equation
Δx. Δp = h/4π , h denotes
a. Wavelength
b. Planck’s constant
c. Frequency
d. Amplitude
12. Azimuthal Quantum Number is denoted by___
a. l
b. m
c. n
d. p
13. According to Pauli Exclusion principle, an orbital can have a maximum of___
a. 4 electrons
b. 3 electrons
c. 2 electrons
d. 1 electron
14. Hund’s principle is associated with____
a. Exclusion
b. Uncertainty
c. Maximum Multiplicity
d. Zeeman effect
15. The transition elements form both ionic as well as covalent compounds due to their____
a. Metallic character
b. Oxidation state
c. Atomic character
d. Ionization potential
16. In the equation
ΔG = ΔH – TΔS ,
H denotes____
a. Entropy
b. Enthalpy
c. Free energy
d. Gradient
17. A system that can neither exchange matter nor heat with the surrounding is called___
a. Isolated system
b. Open system
c. Closed system
d. Free system
18. A system that can exchange both matter and energy with the surrounding is called___
a. Isolated system
b. Closed system
c. Open system
d. Free system
19. A system that exchanges only energy and not matter with the surrounding is called___
a. Isolated system
b. Open system
c. Closed system
d. Free system
20. When the pressure inside a vessel of gases is increased , the temperature ___
a. Falls
b. First falls and then rises
c. Remains unchanged
d. Rises
21. The thermodynamic work done by the system on the surrounding is considered as ____.
a. negative
b. positive
c. neutral
d. neither of them
22. The heat capacity of a thermal energy reservoir is___
a. Infinite
b. Finite
c. Depends on the temperature gradient
d. Cannot be determined
23. A substance with constant chemical composition throughout its mass is called__
a. Impure substance
b. Hetergenous
c. Pure substance
d. Homogeneous
24. Two isentropic and two isobaric processes are a part of___
a. Carnot’s cycle
b. Krebs cycle
c. Rankine cycle
d. Gibbs cycle
25. A pure substance exists in
a. solid phase
b. liquid phase
c. gaseous phase
d. All of the above
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