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प्रश्न
State whether the following statement is true or false. If false write the correct statement.
Melting of butter and wax are examples of chemical changes.
विकल्प
True
False
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उत्तर
False.
Correct Statement: Melting of butter and wax are examples of physical changes.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Boiling of water to form steam.
What do you observe when :
lighted match stick is brought near the mouth of the test tube containing hydrogen gas.
What is a physical change ? Give two examples of physical changes.
Which of the following are physical changes and which are chemical changes ?
Glowing of an electric bulb
Classify the following as a physical or a chemical change.
Drying of wet clothes
State which of the following pertain to – chemical changes.
- Substance retains its identity.
- The change is permanent.
- No new substance is formed.
- Is easily reversible.
- Produces one or more new substances by a change in its composition.
- The change is temporary.
- The composition and properties of the original substance are not altered.
Compare the energy changes involved during a physical and a chemical change.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
When solute is dissolved in a solvent it forms a solution.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
