Corrosion MCQs

Solved MCQs on Corrosion.

To produce ______ coloured hydrated ferric oxide iron undergoes a corrosion process.
(A).  Red
(B).  Brown
(C).  Green
(D).  Blue
(E). None of these

Multiple Choice Question Answer:  b

The estimated amount of wasted iron due to the corrosion process is____ of its annual production.
(A).  1
(B).  1/2
(C).  1/4
(D).  1/8
(E). None of these

Multiple Choice Question Answer:  c

______ more energy than the nickel cadmium batteries is the advantage of the nickel-metal hydrated batteries.
(A).  100%
(B).  50%
(C).  75%
(D).  25%
(E). None of these

Multiple Choice Question Answer:  c

Cells are composed of three parts of zinc used as _______in zinc-air cells.

(A).  Anodes
(B).  Cathode
(C).  Based on the half cell
(D).  Can’t be said
(E). None of these

Multiple Choice Question Answer:  a

The zinc-air batteries contains___emf of their anodes.

(A).  -1V
(B).  -1.25V
(C).  1V
(D).  1.25V
(E). None of these

Multiple Choice Question Answer:  b

The working voltage of the battery is ________ is a drawback of this battery because of the internal losses.
(A).  Higher
(B).  Lower
(C).  Moderate
(D).  Not considerable
(E). None of these

Multiple Choice Question Answer:  b

______voltage of electricity is present in nickel metal hydrated batteries which is a low voltage.
(A).  1V
(B).  1.2V
(C).  1.3V
(D).  1.4V
(E). None of these

Multiple Choice Question Answer:  b

Reverse process of __________ is corrosion.
(A).  Metal extraction
(B).  Metal production
(C).  Metal heating
(D).  Metal moulding
(E). None of these

Multiple Choice Question Answer:  a

Which one of the following does not lost during corrosion?
(A).  Malleability
(B).  Ductility
(C).  Conductivity
(D).  Colour
(E). None of these

Multiple Choice Question Answer:  d

The zinc-air batteries contains___emf of their cathode.
(A).  0.1V
(B).  0.2V
(C).  0.3V
(D).  0.4V
(E). None of these

Multiple Choice Question Answer:  d

Metals are not converted into _____ in corrosion, as a result of decay.
(A).  Oxides
(B).  Hydroxides
(C).  Carbonates
(D).  Peroxides
(E). None of these

Multiple Choice Question Answer:  d

The metals exist in nature in the form of their minerals or ores except ____
(A).  Gold
(B).  Silver
(C).  Copper
(D).  Iron
(E). None of these

Multiple Choice Question Answer:  a

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