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प्रश्न
Fill in the blank.
A change, which alters the composition of a substances, is known as a___________ change.
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उत्तर
A change, which alters the composition of a substances,iis known as a chemical change.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Cutting of trees
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
State whether the following is physical or chemical change.
Digestion of food —
A physical change is temporary. Explain.
Classify the following as physical or chemical changes :
- Cooking of food
- Boiling of water
- Cutting of trees
- D0issolving salt in water
- Digestion of food
- Melting of ice
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.
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical change.
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
Assertion: The explosion of fire cracker is a physical change.
Reason: A physical change is a reversible change.
Tearing of sheet of paper into pieces is ______ By the process of Heating of water, change.
