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प्रश्न
Sublimation is classified as a physical change. Why ?
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उत्तर
Physical changes are those in which no new substance is formed. In sublimation there is direct conversion of solid into gas and vice versa. Thus the substance remains the same.
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संबंधित प्रश्न
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
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3. It is a physical change
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