How will you justify the following changes are physical changes?
a) whipping egg whites
b) Magnetising a compass needle
c) Dicing potatoes
d) Dissolving coffee power in wateR
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Answer:
B. Magnetising a compass needle is a answer
Explanation:
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Physical Change: Properties like size, shape, state (solid, liquid or gas), temperature, pressure etc., are physical properties. Those changes in which only physical properties of a substance changes are called physical changes. For example, lightening of bulb is a physical change.
Chemical Change: The change in which new substance is formed and chemical composition of a substance is changed is called a chemical change. A substance loses its identity in a chemical change and cannot be get back into its original form. For example, burning of candle, formation of curd etc.
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