Question : Which of the following metals is always a component in an amalgam?
Option 1: Strontium
Option 2: Mercury
Option 3: Zinc
Option 4: Aluminium
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Correct Answer: Mercury
Solution : The correct answer is Mercury.
Mercury metal is an essential component of an amalgam. The atomic number of this element is 80. The symbol of Mercury is Hg, given after the Greek word hydor and argyros. Mercury serves as the liquid component that binds the other metals together to form a stable, durable filling material.
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Question : Which of the following metals reacts violently with cold water?
Option 1: Magnesium
Option 2: Aluminium
Option 4: Potassium
Question : Which of the following metals occurs in a free state?
Option 1: Copper
Option 2: Iron
Option 4: Lead
Question : Which of the following is an example of a metalloid?
Option 1: Indium
Option 2: Gallium
Option 3: Boron
Question : Which of the following is arranged in order of decreasing conductivity?
Option 1: Copper, aluminium, steel, silver
Option 2: Aluminium, silver, copper, steel
Option 3: Copper, silver, aluminium, steel
Option 4: Silver, copper, aluminium, steel
Question : Which of the following statements is Incorrect?
Option 1: Metals are used in making cookware.
Option 2: Metals are used in the manufacture of automobiles.
Option 3: Living beings inhale metals during respiration.
Option 4: Metals are used in manufacturing jewellery.
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