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प्रश्न
Classify the following as physical or chemical change :
Formation of curd from milk
विकल्प
Physical change
Chemical change
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उत्तर
Formation of curd from milk – Chemical change
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
Choose the most appropriate answer.
Rising and setting of the sun at a given place is a
Write true or false for the statement.
Deforestation is a man-made change
Ripening of fruits is a desirable change.
Write true or false
Cutting of paper into pieces is a chemical change.
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.
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Give a reason why
Freezing of water is a reversible change while burning of a candle – an irreversible change.
Select the chemical changes from the following list of changes
Rotting of eggs.
