Advertisements
Advertisements
प्रश्न
Define physical change. Give two examples for the above changes.
उत्तर
Physical change: A temporary change in which no new substance is formed, the composition of substance remains the same, though its state, shape and size may change.
Example of physical change:
- Change of water into its vapours.
- Heating of iron rod.
संबंधित प्रश्न
Changes in which only ______ properties of a substance change are called physical changes.
Write short answer.
Give an example of desirable change which can also be undesirable
Classify the following changes as physical or chemical:-boiling
State whether the following is physical or chemical changes.
Slaking of lime —
Write true or false
Cutting of paper into pieces is a chemical change.
Tick (√) the correct alternative from the choice given for the following statement.
An example of both physical and chemical change is
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
Classify the following as a physical or a chemical change.
Burning of coal
Fill in the blank.
The process of a liquid changing into a solid is called ________
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.
Give a reason why
Freezing of water is a reversible change while burning of a candle – an irreversible change.
Select the correct answer from the choice given below to complete the sentence
The dissolution of lead nitrate in water is deemed as a _________ change.
Stretching gold coin into a ring is a ______ change.
What type of change is colouring of a paper?
Distinguish physical and chemical changes.
Which of the following is a physical change?
State whether the following statements are true or false:
Stretching of rubber bands is not a physical change.
Which of the following is not a physical change?
Give an example of a physical change in which the color of the substance changes.
