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प्रश्न
Which of the following are physical changes and which are chemical changes ?
पर्याय
Physical change
Chemical change
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उत्तर
Burning of magnesium wire – Chemical change
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संबंधित प्रश्न
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
Explain why burning of wood and cutting it into small piece are considered as two different types of changes.
Write short answer.
Sublimation is classified as a physical change. Why ?
Classify the following changes as physical or chemical:- melting of a solid (wax)
Classify the following changes as physical or chemical:- photosynthesis in plants
What are reversible and irreversible changes ? Give one example for each.
Write true or false
Cutting of paper into pieces is a chemical change.
What is a chemical change ? Give two examples of chemical changes.
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
The crystallisation of salt from its solution.
