GK
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which of the following substances doesn’t contract on heating
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Iron
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Cast iron
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Silica glass
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Rubber
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Explanation:
Detailed explanation-1: -All the other options only expand on heating due to the increase in kinetic energy of the molecules. Hence the correct option is ice.
Detailed explanation-2: -Hence, two substances which contract on heating are water and silver iodide.
Detailed explanation-3: -Invar, also known as FeNi36, is an iron-nickel alloy notable for its lack of expansion or contraction with temperature changes.
Detailed explanation-4: -Some material like silica glass exhibit negative thermal expansion which makes them contract on heating.
Detailed explanation-5: -When iron is heated to a high temperature, it expands.
There is 1 question to complete.