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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
Which of the following are chemical changes?
- Growth of a plant
- Rusting of iron
- Mixing of iron fillings and sand
- Cooking of food
- Digestion of food
- Freezing of water
- Burning of candle
Tick the most appropriate answer
2. Melting of ice is a
- reversible change
- irreversible change
- chemical change
- none of these
Fill in the blank.
An earthquake is a .................. change.
Write true or false for the statement.
Deforestation is a man-made change
Tick the most appropriate answer.
Rising and setting of the sun at a given place is a
Classify the following as physical or chemical changes :
Breaking of a glass tumbler
Classify the following as a physical or a chemical change.
Boiling of water
State which of the following terms connected with change of state of matter i.e.
(a) Melting
(b) Vaporisation
(c) Condensation
(d) Freezing
pertain to –
- Conversion of a liquid into a vapour or gas.
- Conversion of a liquid into a solid.
- Conversion of a solid into a liquid on heating.
Select the chemical changes from the following list of changes
Respiration in mammals.
Iron pipes coated with zinc do not get rusted easily.
