Question : Which of the following cannot be beaten into sheets?
Option 1: Gold
Option 2: Silver
Option 3: Potassium
Option 4: Aluminium
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Correct Answer: Potassium
Solution : The correct option is potassium.
Malleability refers to the quality of metals that permits them to be hammered or moulded into thin sheets. Because of its softness and limited mechanical strength, potassium cannot be beaten into sheets. It reacts quickly with oxygen and moisture, resulting in the fast production of a brittle oxide coating on its surface that would shatter under mechanical force.
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Question : Which of the following metals is most ductile?
Option 1: Copper
Option 3: Gold
Question : Which of the following chemicals is used in photography ?
Option 1: Aluminium hydroxide
Option 2: Silver bromide
Option 3: Potassium nitrate
Option 4: Sodium chloride
Question : Which of the following elements is more reactive than copper?
Option 2: Zinc
Option 3: Silver
Option 4: Platinum
Question : Which among the following elements comes under metalloids?
Option 1: Germanium
Option 4: Gold
Question : German silver is an alloy of
Option 1: Copper, nickel and silver
Option 2: Silver ,copper and aluminium
Option 3: Zinc copper and nickel
Option 4: Zinc silver and copper
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