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प्रश्न
State whether the following is physical or chemical changes.
heating a mixture of iron filings and sulphur—
उत्तर
chemical change.
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संबंधित प्रश्न
Tick the most appropriate answer.
5. Photosynthesis requires
- heat energy.
- wind energy
- sunlight.
- sound energy
A physical change is temporary. Explain.
Make a list of different types of changes with example.
What do you observe when :
lighted match stick is brought near the mouth of the test tube containing hydrogen gas.
State whether the following is physical or chemical changes.
lightning —
State whether the following is physical or chemical changes.
cutting wood into small pieces —
Which of the following are physical changes and which are chemical changes ?
Freezing of water
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
Fill in the blank with the correct word of the statement given below:
Sublimation involves a __________ change.
Name the following.
A form of energy required for a chemical change.
