Question : Which metal does not undergo corrosion due to the formation of oxide layer?
Option 1: Copper
Option 2: iron
Option 3: Aluminium
Option 4: Znic
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Correct Answer: Aluminium
Solution : The correct answer is Aluminium.
Aluminium is a metal and it has an atomic number of 13. It is highly chemically reactive but it does not corrode because it reacts with atmospheric oxygen and forms a protective layer of aluminium oxide, which prevents it from further corrosion. Formation of aluminium oxide is the reason for the blackening of aluminium utensils.
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Question : The "king of metal" is:
Option 1: gold
Option 2: silver
Option 3: iron
Option 4: aluminium
Question : Philosopher's wool is chemically
Option 1: Aluminium oxide
Option 2: Magnesium oxide
Option 3: Zinc oxide
Option 4: Calcium oxide
Question : Which among the following alloys is made up of copper and zinc?
Option 1: Monel Metal
Option 2: Magnalium
Option 3: Rolled Gold
Option 4: Dutch Metal
Question : An isotope of which of the following is used in the treatment of cancer?
Option 1: Cobalt
Option 2: Iron
Option 3: Nickel
Option 4: Aluminium
Question : The deterioration of a metal by an electrochemical process is commonly termed as
Option 1: Erosion
Option 2: Corrosion
Option 3: Passivation
Option 4: Abrasion
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