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प्रश्न
State four differences between physical and chemical changes.
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उत्तर
| Physical change | Chemical change |
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संबंधित प्रश्न
State whether the following statement is true or false. In case a statement is false, write the corrected statement.
Cutting a log of wood into pieces is a chemical change.
Ripening of fruits is a desirable change.
What role does energy play in initiating a chemical change ?
Classify the following changes as physical or chemical.
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
What is a physical change ? Give two examples of physical changes.
Fill in the blank.
A change, which alters the composition of a substances, is known as a___________ change.
Give a reason why
Change of seasons is a periodic change while the change of weather is a non-periodic change.
Is a change of state of matter – a physical or a chemical change. Give reasons.
The change of state of a substance from solid to liquid and liquid to gas is ______.
