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Question
State whether the following is physical or chemical changes.
water cycle in nature —
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Solution
physical change,
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RELATED QUESTIONS
State the differences between a physical change and 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
True or false
Change of seasons is a non-periodic change.
Write true or false
Deforestation is a man-made change.
Write true or false
Decomposition of leaves is a fast change.
Classify the Following as a Physical Or a Chemical change.
Glowing of an Electric Bulb
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.
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and Step II are:
Give an example to justify the statement that physical changes can be reversible as well as irreversible.
