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प्रश्न
Change is the law of nature which occurs in everyday life.
State when a substance [i.e. matter] undergoes a kind of change.
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उत्तर
Change is the law of nature that occurs in everyday life. A substance [i.e. matter] undergoes a kind of change when subjected to energy changes.
The matter is said to undergo certain changes when energy is added to the matter or removed from the matter.
Examples of Changes are:
- Ice melts on supplying heat to it.
- Milk changes into curd when a little curd is added to hot milk.
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संबंधित प्रश्न
Try segregating the things around you as pure substances or mixtures.
Write short answer.
Name two reversible changes.
State whether the following is physical or chemical changes.
glowing of a bulb -
Classify the following as a physical or a chemical change.
Drying of wet clothes
Classify the Following as a Physical Or a Chemical Change.
Making of a Sugar Solution
State which of the following terms connected with change of state of matter i.e.
(a) Melting
(b) Vaporisation
(c) Condensation
(d) Freezing
pertain to –
- Conversion of a liquid into a vapour or gas.
- Conversion of a liquid into a solid.
- Conversion of a solid into a liquid on heating.
Sublimation of Iodine is a ______.
Natural changes which take place in nature on their own, are beyond the control of human being.
Analogy:
Melting of ice: Physical change.
Popping of popcorn: ______.
Give two examples for the following case:
Physical changes which are reversible
