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प्रश्न
Changes in which only ______ properties of a substance change are called physical changes.
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उत्तर
Changes in which only physical properties of a substance change are called physical changes.
Explanation:
Physical changes alter only the physical properties, not the chemical composition, of a substance.
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संबंधित प्रश्न
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
A physical change is temporary. Explain.
Name two reversible changes.
Compare the energy changes involved during a physical and a chemical change.
Select the correct answer from the choice given below to complete the sentence
A change in which a substance retains its identity is a
______ change.
Give the reason why the following is considered as chemical changes.
A bright light is seen evolved when a strip of magnesium is heated.
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
Fill in the blanks in the following statements using the words given in the box.
| rusted, colourful, substance, chemical, physical, reversible, iron oxide, object |
- Making sugar solution is a ______ change.
- A physical change is generally ______.
- Grinding of wheat grain changes its size. It is a ______ change.
- Iron benches kept in lawns and gardens get ______. It is a ______ change because a new ______ is formed.
Grinding of wheat grain changes its size. It is a ____________ change.
The change of state of a substance from solid to liquid and liquid to gas is ______.
