1. Oxidizing power of element depend upon its
a. ionization energy
b. electron affinity
c. electrode potential
d. oxidation potential
Correct Option: c
2. when atom reacts chemically and gains one or more electron, it is said to be
a. catalyzed
b. reduced
c. oxidized
d. decomposed
Correct Option: b
3. oxidation takes place always on
a. anode
b. cathode
c. at both electrodes
d. none of these
Correct Option: a
4. electrolysis is used for
a. electroplating
b. manufacture of Na
c. mnufacture of Al
d. all o these
Correct Option: d
5. At equilibrium standard cell potential will be
a. minimum
b. zero
c. greater than zero
d. lesser than zero
Correct Option: b
6. in electrolytic cell current move from
a. anode to cathode in external circuit
b. cathode to anode in external circuit
c. anode to cathode in internal
d. none of these
Correct Option: a
7. in electrolytic cell reaction always will be
a. fast
b. slow
c. non spontaneous
d. spontaneous
Correct Option: c
8. in Galvanic cell ∆E can never be
a. zero
b. constant
c. negative
d. positive
Correct Option: c
9. the reduction potential of Al is -1.66v and Sn is -0.14v when these are connected which one act as cathode
a. depend upon Conc.
b. tin electrode
c. Al electrode
d. depend upon temp
Correct Option: b
10. overall positive value of cell potential predicts that process is
a. not possible
b. cannot be predicted
c. feasible
d. not feasible
Correct Option: c
11. Standard electrode potential of x, y, z are -1.2 v, +0.5v and -3.0V respectively . Predict decreasing order of reducing power sequence
a. Y> X> Z
b. Z > X> Y
c. Y> Z> X
d. X > Y> Z
Correct Option: b
12. two Half cell of galvanic cell are connected through salt bridge which
a. carries out electrolysis
b. carries ions from one half cell to other
c. carries electrons from one Half cell to other
d. indicate the value of emf
Correct Option: b
13. reaction on galvanic cell mostly will be
a. depend upon emf
b. sontaneous
c. non spontaneous
d. depend upon conc.
Correct Option: b
14. Saturated solution of KNO3 is used to make ‘salt-bridge’ because
a. KNO3 is highly soluble in water
b. velocities of both K+ and are nearly the same
c. velocity of K+ is greater than that of NO3
d. ) velocity of NO3 ion is greater than that of K+
Correct Option: b
15. the strongest reducing agent is
a. Mn+2
b. Cr+3
c. Cr
d. Cl-
Correct Option: c
16. In the electrolytic cell, flow of electrons is from
a. cathode to anode in solution
b. cathode to anode through internal supply
c. cathode to anode through external supply
d. anode to cathode through internal supply
Correct Option: b
17. based on data strong oxidizing agent is
a. Cr+3
b. Cl-1
c. MnO42-
d. Mn+2
Correct Option: c
18. Reaction will spontaneous if
a. ∆E equal to zero
b. ∆E smaller than zero
c. ∆E remains constant
d. ∆E greater than zero
Correct Option: d
19. Fuel cell efficiency is upto
a. 40%
b. 60%
c. 20%
d. 90%
Correct Option: d
20. Efficiency of heat engine is upto
a. 60%
b. 70%
c. 90%
d. 40%
Correct Option: d
21. liquid junction potential is
a. Affect efficiency of cell
b. Does not contribute into anything
c. useful
d. not useful
Correct Option: a
22. Determination of cell potential under non standard conditions is done through
a. galvanic cell
b. cannot done
c. Nerst equation
d. electrolytic cell
Correct Option: c
23. in IUPAC system negative sign is for
a. Reduction
b. oxidation potential
c. depend upon condition
d. none of these
Correct Option: a
24. Asymmetric and Electrophoretic effect are not shown by
a. Dilute solution
b. Concentrated solution
c. non ideal solution
d. none of these
Correct Option: a
25. based on data strong oxidizing agent is
a. Cr+3
b. Cl-1
c. MnO42-
d. Mn+2
Correct Option: c
26. The gas X at 1 atm is bubbled through a solution containing a mixture of 1 M Y- and I MZ- at 25°C. If the order of reduction potential is Z> Y > X, then
a. Y will reduce both X and Z
b. Y will oxidise X and not Z
c. Y will oxidise Z and not X
d. Y will oxidise both X and Z
Correct Option: b
27. Debye theory was postulated to cover
a. Interionic repulsion
b. Interionic repulsion in dilution solution
c. Interionic repulsion in conc. Solution
d. Interionic attraction
Correct Option: d
28. Effective Concentration accounts for
a. Non ideal behavior
b. Ideal behavior
c. dilute solution
d. none of these
Correct Option: a
29. Activity coefficient value is unity when
a. Solution is dilute
b. solution is concentrated
c. solution is non ideal
d. none of these
Correct Option: a
30. Corrosion is prevented by
a. Barrier protection
b. cathodic protection
c. sacrificial protection
d. all o these
Correct Option: d
31. Electrolyte’s solution shows deviation from ideal behavior due
a. pressure
b. volume
c. concentration
d. tamperature
Correct Option: c
32. Can we calculate electrode potential of electrode individually
a. only in the presence of standard electrode
b. yes
c. no
d. none of these
Correct Option: a
33. Rate of electron transfer is calculated by method of
a. Debye huckle theory
b. collision theory
c. solution theory
d. Transition state theory
Correct Option: d
34. Schrodinger equation describe
a. Motion of electron wave and particle
b. Motion of electron particle
c. motion of electron wave
d. none of these
Correct Option: a
35. Calculation of motion of electron in three dimensional box gives
a. wave function of electron
b. quantum numbers
c. energy of electron
d. all of these
Correct Option: d
36. Eign value is
a. Numerical value
b. imaginary value
c. theoretical value
d. none of these
Correct Option: a
37. In quantum, lowest energy level is
a. highest
b. discrete
c. not zero
d. zero
Correct Option: c
38. for rigid rotator quantum mechanical calculation
a. variable bond length
b. variable energy
c. negligible bond length
d. Vibration kept neligible
Correct Option: d
39. what is Cn number in water
a. C2
b. C1
c. C4
d. none of these
Correct Option: a
40. what is Cn number in BF3
a. C4
b. C3
c. C1
d. C2
Correct Option: b
41. what is main axis in symmetry
a. y axis
b. principle axis
c. subsidiary axis
d. x-axis
Correct Option: b
42. what is Cn in staight line structure
a. C4
b. C∞ (infinity)
c. C2
d. C3
Correct Option: b
43. symmetry is repitition of
a. faces
b. edges
c. corners
d. all of these
Correct Option: d
44. σ v is the plane
a. parallel to priciple axis
b. perpendicular to principle axis
c. dihedral to priciple axis
d. none of these
Correct Option: a
45. σ h is the plane which is
a. perpendicular to priciple axis
b. parallel to principle axis
c. diherdral to principle axis
d. none of these
Correct Option: a
46. at higher atomic number quntum theory follows rules of
a. classical theory
b. quantum theory
c. planks theory
d. none of these
Correct Option: a
47. σ v number is either zero or
a. 2
b. 3
c. equal to priciple axis number
d. subsidiary axis number
Correct Option: c
48. reduction is
a. gain of oxygen
b. loss of hydrogen
c. gain of electron
d. loss of electron
Correct Option: c
49. Number of C2 in BF3
a. 2
b. 1
c. 0
d. 3
Correct Option: d
50. Cn in benzene
a. 5
b. 2
c. 1
d. 6
Correct Option: d
———————-
MCQs Part-2
———————
1.What is Corrosion?
a) Destruction or deterioration of a material
b) Conversion of metal atoms to metallic ions
c) Conversion of metal ions to metal atoms
d) Destruction of materials involving in the conversion of metal atoms into metal ions
Answer: (d)
2.Which of the following materials will undergo Corrosion?
a) Metals only
b) Metals and Non-metals
c) Metals, Non-metals, Ceramics and Plastics
d) Metals, Non-metals, Ceramics, Plastics and Rubbers
Answer: (d)
3.Corrosion of material by furnace gases is classified as _____;
a) wet corrosion
b) dry corrosion
c) galvanic corrosion
d) crevice corrosion
Answer: (b)
4.Which of the following is an example of wet corrosion?
a) Corrosion of metal in the water
b) Corrosion of iron in the presence of anhydrous calcium chloride
c) Corrosion of titanium in dry chlorine
d) Corrosion due to furnace gases
Answer: (a)
5.What is the reason for corrosion?
a) Stability of a metal ion
b) Stability of a metal atom
c) Passivation
d) Use of coatings
Answer: (a)
6.Which of the following are necessary in the process of corrosion?
a) Anode
b) Cathode
c) Electrolyte
d) Anode, Cathode and Electrolyte
Answer: (d)
7.Corrosion involves _______ reactions.
a) oxidation
b) reduction
c) displacement
d) both oxidation and reduction
Answer: (d)
8.Which of the following is considered as high corrosive resistant material?
a) Mild steel
b) Cast iron
c) Zinc
d) Stainless steel
Answer: (d)
9.Which of the following is an incorrect statement?
a) Corrosion is an irreversible process
b) Corrosion is a non-spontaneous process
c) Corrosion is a degradation process
d) Corrosion is a spontaneous process
Answer: (b)
10.Which of the following is an example of corrosion?
a) Rusting of iron
b) Tarnishing of silver
c) Liquefaction of ammonia
d) Rusting of iron and tarnishing of silver
Answer: (d)
11.In wet corrosion ____ are formed at the cathodic areas.
a) Organic compounds
b) Metallic ions
c) Non-metallic ions
d) Inorganic compounds
Answer: (c)
12.Rusting of iron in neutral aqueous solution of electrolyte occurs in the presence of oxygen with the evolution of _____;
a) Nitrogen
b) Chloride
c) Sulphide
d) Hydrogen
Answer: (d)
13.Select the incorrect statement about the wet corrosion from the following option.
a) It involves the setting up of large number of galvanic cells
b) It is explained by absorption mechanism
c) It occurs only on heterogeneous metal surface
d) It is a fast process
Answer: (b)
14.Which of the following factor influences the rate and extent of corrosion?
a) Nature of metal only
b) Nature of the environment only
c) Both nature of metal and environment
d) Nature of reaction
Answer: (c)
15.What is the other name of galvanic corrosion?
a) Bi-metallic corrosion
b) Mono-metallic corrosion
c) Localized corrosion
d) Mono-metallic and localized corrosion
Answer: (a)
16.Which of the following is the driving force in galvanic corrosion?
a) Conductivity of electrolyte
b) Crystal structure of metals
c) The potential difference between the two metals
d) Temperature of electrolyte
Answer: (c)
17.Which of the following is the primary characteristic of an electrolyte to form corrosion?
a) Electrical resistivity
b) Thermal resistivity
c) Thermal conductivity
d) Electrical conductivity
Answer: (d)
18.Which of the following is the most corrosion-resistant metal at room temperature?
a) Titanium
b) Platinum
c) Gold
d) Tantalum
Answer: (d)
19.Pitting is a form of extremely localized attack that results in holes in the metal.
a) It involves the setting up of large number of galvanic cells
b) It is explained by absorption mechanism
c) It occurs only on heterogeneous metal surface
d) It is a fast process
Answer: (b)
20.Which of the following form of corrosion is more destructive and insidious in nature?
a) Uniform corrosion
b) Intergranular corrosion
c) Pitting corrosion
d) Galvanic corrosion
Answer: (c)
21.Which of the following are the reasons that make it difficult to detect pits?
a) Small size
b) Varying depths
c) Pits covered with corrosion products
d) Small size, varying depths and covered with corrosion products
Answer: (d)
22.Which of the following corrosion form is autocatalytic in nature?
a) Pitting and crevice corrosion
b) Crevice corrosion only
c) Pitting corrosion only
d) Pitting and intergranular corrosion
Answer: (a)
23.Which of the following corrosion form is/are autocatalytic in nature?
a) Pitting and crevice corrosion
b) Crevice corrosion only
c) Pitting corrosion only
d) Pitting and intergranular corrosion
Answer: (c)
24.Which of the following corrosion test is most reliable to know the extent of pitting corrosion?
a) To measure the average depth of pits
b) To measure the maximum depth of a pit
c) Weight loss method
d) Weight gain method
Answer: (b)
25.Which of the following are the destructive effects of corrosion?
a) Contamination of product
b) Effect on safety
c) Reliability
d) Contamination of product, effect on safety and reliability
Answer: (d)
26.Which of the following method is adopted for preventing corrosion by acids?
a) Deaeration
b) Removal by using ion-exchange resin
c) Neutralisation with lime
d) Dehumidification
Answer: (c)
27.Which of the following method is adopted for preventing corrosion by salts?
a) Deaeration
b) Removal by using ion-exchange resin
c) Neutralisation with lime
d) Dehumidification
Answer: (b)
28.Which of the following method is adopted for preventing corrosion by moisture?
a) Deaeration
b) Removal by using ion-exchange resin
c) Neutralisation with lime
d) Dehumidification
Answer: (d)
29.The organic or inorganic substances which when added to the environment are able to reduce the rate of corrosion are called ______
a) Inhibitors
b) Stimulants
c) Insulators
d) Stipulator
Answer: (a)
30.The process by which Ta, Nb and Ti combine with carbon to form respective carbides and prevent corrosion is known as _______
a) Passivation
b) Neutralisation
c) Inhibition
d) Stimulation
Answer: (b)
———————-
MCQs Part-3
———————
- Rigid rotator tells us about….
- Rotational quantum number
- Vibrational quantum number
- The operator ∇ is called _______ operator
- Hamiltonian (b) Laplacian
(c ) Poisson (d) vector
- In a rigid rotator distance between two particles is _______
(a) Variable (b) Zero
(c) Infinite (d) constant
- The balancing of a rigid rotor can be achieved by appropriately placing balancing masses in
(a) Single plane (b) two planes
(c) Three planes (d) four planes
- The energy gap between two adjacent quantum states for the rigid rotor system
- decrease as the quantum number becomes larger
- increase as the quantum number becomes larger
- is a constant
- neither
The main condition for the rigid body is that the distance between various particles of the body does change.
a) True
b) False- The potential energy of a rigid rotator will be….
- Zero
- Constant
- 1
- Both a & b
- “Wave function is a product of two functions” is this statement true?
- True
- false
- while considering the rotational spectra of diatomic molecule quantum number is written as?
- J
- L
- P
- I
- The solution of the Schrödinger equation for the rigid rotor system resulted in degenerated states for a nonzero angular momentum quantum number . For the energy level, the degeneracy is:
- 5
- 2
- 3
- 1
- The solution of the Schrödinger equation for the rigid rotor system results in degenerated states for a nonzero angular momentum quantum number energy level, the degeneracy is:
- 5
- 3
- 2
- 1
- The laplacian is which of the following operator?
- Non linear operator
- Order statistic operator
- Linear operator
- None of the mentioned
- The laplacian operator cannot be used in which of the following?
- Two dimensional heat equation
- Two dimensional wave equation
- Poison equation
- Maxwell equation
- Which types of coordinates are used in study of rigid rotator?
- Polar coordinates
- Cartesian coordinates
- Ɵ & ɸ are?
(a) Cartesian coordinates
(b) Polar coordinates
- When does the moment of inertia of a body come into the picture?
(a) When the motion is rotational
(b) When the motion is linear
(c) When the motion is along a curved path
(d) None of the above
