Corrosion MCQ Class 10
Q. 1 What is the chemical formula of rust?
(1) Fe2O3
(2) Fe2O3.xH2O
(3) FeCO3
(4) FeCO3.xH2O
Ans: (1) Fe2O3
Q. 2 What is required for iron to rust?
(1) water
(2) Air
(3) its open surface
(4) All of the above.
Ans: (4) All of the above.
Q. 3 Rusting is a type of:
(1) Reduction Reaction
(2) Displacement Reaction
(3) Oxidation Reaction
(4) Decomposition Reaction
Ans: (3) Oxidation Reaction
Q. 4 How can items made of iron be prevented from corrosion?
(1) Paint
(2) Oil
(3) Oil paint
(4) All of the above
Ans: (4) All of the above
Q. 5 What is rust primarily composed of?
(1) Hydrated Iron (III) Oxide
(2) Hydrated Iron (II) Oxide
(3) Hydrated Iron (VI) Oxide
(4) Hydrated Iron (IV) Oxide
Ans: (1) Hydrated Iron (III) Oxide
Q. 6 How can iron be protected from corrosion by the application of a layer?
(1) Chromium
(2) Nickel
(3) Zinc
(4) All of the above
Ans: (4) All of the above
Q. 7 Which metal is least prone to corrosion?
(1) Iron
(2) Aluminum
(3) Gold
(4) None of them
Ans: (3) Gold
Q. 8 What is the most suitable method to protect an iron fry pan from rust?
(1) Greasing
(2) Oil Painting
(3) Layer of Zinc
(4) All of the above
Ans: (3) Layer of Zinc
Q. 9 What is the process called when a layer of oxygen forms on the surface of aluminum?
(1) Anodizing
(2) Rusting
(3) Catenation
(4) Galvanization
Ans: (1) Anodizing
Q. 10 What metal is used to create galvanized iron?
(1) Chromium
(2) Nickel
(3) Zinc
(4) Oil
Ans: (3) Zinc