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प्रश्न
Name the following:
The type of change physical or chemical involved – ‘when a substance undergoes a change in state, colour or size’.
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उत्तर
Physical Change.
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संबंधित प्रश्न
What role does energy play in initiating a chemical change ?
Classify the following changes as physical or chemical:- photosynthesis in plants
State four differences between physical and chemical changes.
State whether the following is physical or chemical change.
Digestion of food —
Write true or false
Earthquake is a desirable change.
True or false
Is the process of digestion a physical change?
Fill in the blank
Changes that occur in nature are called ______
Two chemical substances X and Y combine together to form a product P which contains both X and Y X + Y P
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following statements concerning X, Y and P are correct ?
- P is a compound
- X and Y are compounds
- X and Y are elements
- P has a fixed composition
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.
Desirable and undesirable change.
Compare the energy changes involved during a physical and a chemical change.
