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प्रश्न
State whether the following statement is true or false. If false write the correct statement.
Melting of ice is an exothermic, irreversible chemical change.
विकल्प
True
False
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उत्तर
False.
Correct Statement: Melting of ice is an endothermic, reversible physical change.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
Explain the following giving an example.
Pure substance
Fill in the blank.
Heat is .................... by a gas during the process of condensation.
Write short answer.
Give two examples of periodic changes
Write short answer.
What are man-made changes ?
Write true or false
Cutting of paper into pieces is a chemical change.
Tick the most appropriate answer.
Physical changes are
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
Classify the Following as a Physical Or a Chemical Change.
Curdling of Milk
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.
Natural and man-made change.
