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प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
विकल्प
Chemical change
Physical change
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उत्तर
Physical change
Explanation:
Cutting down trees changes their physical shape and size, but does not change their chemical composition or nature. Hence it is classified as a physical change.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Passing of electric current through water, and water breaking down into hydrogen and oxygen gases.
Which of the following are chemical changes?
- Growth of a plant
- Rusting of iron
- Mixing of iron fillings and sand
- Cooking of food
- Digestion of food
- Freezing of water
- Burning of candle
Fill in the blank
Heat is ________ by a gas during the process of condensation.
Write true or false
Dissolving of solute in a solvent and rusting of iron are both physical changes.
What is a physical change ? Give two examples of physical changes.
Compare the energy changes involved during a physical and a chemical change.
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.
Select the chemical changes from the following list of changes
Boiling of milk.
Select the correct answer from the choice given below to complete the sentence
The matter is added or removed during a ____________ change.
Classify the following as physical or chemical properties
The composition of a sample of steel is 98% iron, 1.5% carbon and 0.5% other elements.
