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प्रश्न
True or false
Is melting of ice a reversible change?
पर्याय
True
False
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उत्तर
True
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
Classify the following as chemical or physical change:
Boiling of water to form steam.
Dissolving salt in water is a reversible change.
What do you observe when :
lighted match stick is brought near the mouth of the test tube containing hydrogen gas.
Tick the most appropriate answer.
Photosynthesis requires
Photosynthesis cannot take place at night.
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
Give four difference between physical and chemical changes.
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.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
