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प्रश्न
Differentiate between a physical change and a chemical change with reference to – Nature of change is temporary and reversible or permanent and irreversible.
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उत्तर
| Physical change | Chemical change |
| Changes are temporary and reversible. | Change is permanent and irreversible |
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संबंधित प्रश्न
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
Write true or false
Cutting of paper into pieces is a chemical change.
Sublimation is classified as a physical change. Why ?
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.
Desirable and undesirable change.
Fill in the blanks with the appropriate words of the statement given below:
Heating a piece of iron is considered a __________ change while heating a piece of coal [carbon] is considered a ___________ change.
Give a reason why – Heating a platinum wire is a reversible change but, heating a magnesium wire is an irreversible change.
What type of change is colouring of a paper?
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
