Corrosion MCQs

Corrosion is the process through which a material deteriorates due to reactions with its environment. It is a natural phenomenon, much like how water seeks the lowest point, as all natural processes aim for the lowest possible energy states. Corrosion can be defined in various ways: some definitions are specific to particular forms of corrosion, while others encompass a wide range of deterioration types. The impact of corrosion on our daily lives is both direct, affecting the lifespan and usability of our assets, and indirect, as the costs associated with corrosion are often passed on to consumers by manufacturers and service providers. Corrosion can be either uniform, where the metal corrodes evenly across the entire surface, or localized, affecting only small, specific areas.

Galvanic cells are also named as

(a) electrolytic cells
(b) battery cells
(c) daniel cells
(d) john cells

Which of the following methods is not used for the prevention of corrosion?

(a) greasing
(b) painting
(c) plating
(d) Heating

Voltaic cells generate electricity by

(a) spontaneous redox reaction
(b) non-spontaneous redox reaction
(c) sublimation reaction
(d) thermochemical reaction

Galvanization is a method to

(a) protect the iron metal from corrosion
(b) extract iron from its ore
(c) protect food from rancidity
(d) improve the ductility property of the metal

Which of the following non-metals is liquid at room temperature?

(a) iodine
(b) bromine
(c) carbon
(d) sulphur

Corrosion can be prevented by

(a) alloying
(b) tinning
(c) galvanizing
(d) all of the above

Rusting of iron could take place in

(a) distilled water
(b) ordinary water
(c) distilled and ordinary water
(d) none of the above

Elements which have properties of metals and nonmetals are

(a) amorphous
(b) crystalline
(c) metalloids
(d) metals

During roasting which of the following poisonous gases is mainly produced

(a) CO
(b) CO₂
(c) SO₂
(d) N₂O

Widening of a river valley takes place due to

(a) corrosion
(b) lateral erosion
(c) corrasion
(d) hydraulic action