Question : Which of the following metals occurs in a free state?
Option 1: Copper
Option 2: Iron
Option 3: Zinc
Option 4: Lead
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Correct Answer: Copper
Solution : The correct answer is Copper.
Copper exists in nature in a relatively pure or free condition. Copper nuggets and deposits of native copper have been discovered all over the world. However, while copper can occur in very pure form, the majority of the world's copper is derived from copper ores through mining and extraction methods.
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Question : Brass is an alloy of
Option 1: lead and tin
Option 2: zinc and copper
Option 3: antimony, tin and lead
Option 4: zinc, tin and copper
Question : Galvanisation is the
Option 1: deposition of zinc on iron
Option 2: deposition of tin on iron
Option 3: deposition of copper on iron
Option 4: deposition of aluminium on iron
Question : Which of the following metals is always a component in an amalgam?
Option 1: Strontium
Option 2: Mercury
Option 4: Aluminium
Question : Which of the following metals reacts violently with cold water?
Option 1: Magnesium
Option 2: Aluminium
Option 4: Potassium
Question : Galvanisation is a process in which a protective_________ coating is applied to iron to prevent it from rusting.
Option 1: nickel
Option 2: zinc
Option 3: copper
Option 4: silver
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