Advertisements
Advertisements
प्रश्न
Change is the law of nature which occurs in everyday life.
State when a substance [i.e. matter] undergoes a kind of change.
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Classify the following as chemical or physical change:
Dissolving common salt in water.
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Cutting a log of wood into pieces is a chemical change.
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
Fill in the blank.
Heat is .................... by a gas during the process of condensation.
A burning candle shows both physical and chemical changes. Explain ?
Fill in the blank.
The process of a liquid changing into a solid is called ________
State whether the following statement is true or false. If false write the correct statement.
Melting of ice is an exothermic, irreversible chemical change.
Select the chemical changes from the following list of changes
Drying of a fruit
Select the correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
