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प्रश्न
Name the following.
A form of energy required for a chemical change.
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उत्तर
Generally, HEAT ENERGY is required but light, pressure, or electricity can also be needed.
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संबंधित प्रश्न
Tick the most appropriate answer
2. Melting of ice is a
- reversible change
- irreversible change
- chemical change
- none of these
State four differences between physical and chemical changes.
What are man-made changes ?
Define a chemical change. Give two examples of the above changes.
Given reason:
Burning of paper is a chemical change.
Change is the law of nature and occurs in our everyday life, at all times and in all places.
Differentiate between the following change with a suitable example.
Periodic and non-periodic change
Give the reason why the following is considered as chemical changes.
A piece of magnesium strip is dropped into a beaker containing dilute hydrochloric acid.
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
Gas exists in three states as solid, liquid, and gas.
Iron pipes coated with zinc do not get rusted easily.
