Advertisements
Advertisements
प्रश्न
What will you take into account while identifying the following?
A physical change in a substance.
Advertisements
उत्तर
Physical changes are those changes in which only the forms of substances get modified; the chemical natures and compositions of the substances involved are not altered.
Characteristics:
- No new substance is formed during a physical change.
- Most physical changes can be reversed easily.
- The chemical composition of a substance undergoing physical change remains the same.
संबंधित प्रश्न
Classify the following as chemical or physical change:
Dissolving common salt in water.
State whether the following is physical or chemical changes.
growing of a piglet into a pig —
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
Tick the most appropriate answer.
Physical changes are
Write true or false
A natural change can also be a desirable 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.
Natural and man-made change.
Select the chemical changes from the following list of changes
Change of seasons
Analogy:
Melting of ice: Physical change.
Popping of popcorn: ______.
Match the items of Column I with the items of Column II.
| Column I | Column II | ||
| (a) | Large crystals | (i) | Turns lime water into milky |
| (b) | Depositing a layer of zinc on iron | (ii) | Physical change |
| (c) | Souring of milk | (iii) | Rust |
| (d) | Carbon dioxide | (iv) | Sugar candy (Mishri) |
| (e) | Iron oxide | (v) | Chemical change |
| (f) | Dissolving common salt in water | (vi) | Galvanisation |
