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प्रश्न
Classify the following as physical or chemical change :
Formation of curd from milk
विकल्प
Physical change
Chemical change
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उत्तर
Formation of curd from milk – Chemical change
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संबंधित प्रश्न
Fill in the blank.
Heat is .................... by a gas during the process of condensation.
Classify the following changes as physical or chemical:- photosynthesis in plants
True or false
Dissolving of a solid in liquid is a physical change.
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
Classify the following as physical or chemical change :
Growth of a plant
What is a chemical change ? Give two examples of chemical changes.
Which of the following are physical changes ?
- melting of iron metal
- rusting of iron metal
- bending of an iron rod
- drawing a wire of iron metal
State which of the following pertain to – chemical changes.
- Substance retains its identity.
- The change is permanent.
- No new substance is formed.
- Is easily reversible.
- Produces one or more new substances by a change in its composition.
- The change is temporary.
- The composition and properties of the original substance are not altered.
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.
Give a reason why rusting of iron is a chemical change but, the magnetization of iron is a physical change.
