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प्रश्न
State whether the following is physical or chemical changes.
growing of a piglet into a pig —
उत्तर
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
What are reversible and irreversible changes ? Give one example for each.
What do you observe when :
lighted match stick is brought near the mouth of the test tube containing hydrogen gas.
Write true or false
Melting of ice is a physical change.
The rusting of an iron object is called :
Given reason:
Burning of paper is a chemical change.
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.
Periodic and non-periodic change
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.
Slow and fast change.
Select the chemical changes from the following list of changes
The crystallisation of salt from its solution.
Select the correct answer from the choice given below to complete the sentence
A change in which a substance retains its identity is a
______ change.
