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प्रश्न
What will you take into account while identifying the following?
A physical change in a substance.
उत्तर
Physical changes are those changes in which only the forms of substances get modified; the chemical natures and compositions of the substances involved are not altered.
Characteristics:
- No new substance is formed during a physical change.
- Most physical changes can be reversed easily.
- The chemical composition of a substance undergoing physical change remains the same.
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: curdling of milk
Classify the following changes as physical or chemical.
State the Differences Between a Physical Change and a Chemical Change.
Differentiate between a physical change and a chemical change with reference to – Nature of change is temporary and reversible or permanent and irreversible.
State whether the following statement is true or false. If false write the correct statement.
Melting of ice is an exothermic, irreversible chemical change.
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
Physical Change: Boiling::Chemical Change: ______.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
Mention a few physical properties of a substance.
