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प्रश्न
Which of the following are physical changes and which are chemical changes ?
पर्याय
Physical change
Chemical change
उत्तर
Burning of magnesium wire – Chemical change
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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
Fill in the blank
change in which the substance can be brought back to its original state is called a ............... change.
Classify the following changes as physical or chemical:-boiling
Define physical change. Give two examples for the above changes.
State why addition of sodium chloride to water is considered a physical change, while addition of dilute sulphuric acid to zinc is considered a chemical change.
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
Select the chemical changes from the following list of changes
Preparation of carbon dioxide from calcium carbonate & dilute hydrochloric acid.
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.
Natural changes which take place in nature on their own, are beyond the control of human being.
Iron pipes coated with zinc do not get rusted easily.
