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प्रश्न
Classify the following as a physical or a chemical change.
Burning of coal
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उत्तर
Chemical change
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संबंधित प्रश्न
Ripening of fruits is a desirable change.
A physical change is temporary. Explain.
State whether the following is physical or chemical changes.
cutting wood into small pieces —
Separate the following into physical and chemical changes :
Sublimation of a solid, Decomposition of water into hydrogen and oxygen by passing electric current, Formation of clouds, Making a fruit salad from raw fruits, Dissolving carbon dioxide in water
Classify the following as a physical or a chemical change.
Manufacture of salt from sea water
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Natural and man-made change.
Select the correct answer from the choice given below to complete the sentence
The energy required for completion of a physical change is ______________ when the change is reversed.
Digestion of food is a physical change.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
Which of the following is a physical change?
