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प्रश्न
Fill in the blank.
The process of a liquid changing into a solid is called ________
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उत्तर
The process of a liquid changing into a solid is called freezing.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Boiling of water to form steam.
Tick the most appropriate answer.
3. Physical changes are
- permanent.
- periodic,
- temporary
- irreversible.
Write short answer.
What are man-made changes ?
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
State whether the following is physical or chemical changes.
burning of sugar —
Tick (√) the correct alternative from the choice given for the following statement
Which one of the following is volatile in nature ?
Classify the Following as a Physical Or a Chemical Change.
Making of a Sugar Solution
Give a reason why – Addition of zinc nitrate to water is a physical change but, the addition of zinc to dilute nitric acid is a chemical change.
In a solution of salt in water, water is the solute
Cutting a log of wood into pieces is a chemical change.
