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प्रश्न
True or false
In a physical change no net energy change is involved.
विकल्प
True
False
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उत्तर
True
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संबंधित प्रश्न
When a candle burns, both physical and chemical changes take place. Identify these changes. Give another example of a familiar process in which both the chemical and physical changes take place.
Classify the following changes as physical or chemical:- melting of a solid (wax)
Classify the following changes as physical or chemical:-boiling
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
Classify the following as a physical or a chemical change.
Melting of wax
Given reason:
Freezing of water to ice and evaporation of water are physical changes.
Distinguish between the following.
Physical change and chemical change
What will you take into account while identifying the following?
A physical change in a substance.
Classify the following as physical or chemical properties
Metallic sodium is soft enough to be cut with a knife.
Which of the following is not a physical change?
