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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