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प्रश्न
Write true or false
Melting of ice is a physical change.
विकल्प
True
False
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उत्तर
True
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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.
Classify the following changes as physical or chemical:-boiling
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
Solve this crossword by using the clues that follow-
Across
1. Energy in the form of sunlight is absorbed by the green plants in this process.
4. The reddish-brown substance formed over iron in the presence of oxygen and moisture.
5. This change is permanent and irreversible.
6. The process in which a solid directly changes into gaseous state.
Down
1 . It is the change that takes place in case of swinging pendulum of a clock. –
2. Occurrence of this is a non-periodic change as well as a natural change.
3. It is a physical change.
Classify the following as a physical or a chemical change.
Boiling of water
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
Fill in the blank with the appropriate word of the statement given below:
Germination of seeds is considered a __________ change.
When a woolen yarn is knitted to get a sweater, the change can be classified as ____________.
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
