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प्रश्न
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
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उत्तर
physical change,
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संबंधित प्रश्न
State whether the following is physical or chemical changes.
Slaking of lime —
What is a physical change ? Give two examples of physical changes.
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.
Name the following:
The final product of the physical change involved during the ‘melting of a piece of wax’.
Give four reasons why the burning of a magnesium ribbon in the air is considered a chemical change.
Give a reason why – Addition of zinc nitrate to water is a physical change but, the addition of zinc to dilute nitric acid is a chemical change.
Name the following.
The salt obtained when a chemical change takes place on the addition of iron to dilute sulphuric acid.
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 |
Grinding of wheat grain changes its size. It is a ____________ change.
Give an example to justify the statement that physical changes can be reversible as well as irreversible.
