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प्रश्न
True or false?
During a physical change energy is either given out or absorbed by the system.
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
What do you observe when :
a piece of paper is burnt
What do you observe when :
a spoon of sugar is heated in a pan
State whether the following is physical or chemical changes.
Melting of wax —
Chemical changes are accompanied by changes in energy.
Under which different types can the following changes be classified?
Revolution of the earth around the sun.
Under which different types can the following changes be classified?
Stretching of a spring.
Give reason.
While purchasing canned food, its expiry date should be checked.
Give reason.
A dry handkerchief gets wet at once on dipping in water, but it takes longer for a wet handkerchief to dry.
______ is the process in which something becomes different from what it was earlier.
Cut vegetables turn brown when exposed to air, this is due to ______.
