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प्रश्न
What is a chemical change? Give two examples of chemical change?
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उत्तर
A chemical change is a permanent change in which the chemical composition of a substance is changed and a new substance is formed.
Examples:
Heating of copper carbonate
Formation of curd from milk
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संबंधित प्रश्न
Name three biochemical catalysts found in the human body.
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\[\ce{X + Y -> P}\]
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(i) P is a compound
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(iii) X and Y are elements
(iv) P has a fixed composition
Write a note on the catalyst.
