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प्रश्न
Stretching gold coin into a ring is a ______ change.
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उत्तर
Stretching gold coin into a ring is a
physical change.
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संबंधित प्रश्न
Classify the following changes as physical or chemical:-boiling
Fill in the blank
Heat is ________ by a gas during the process of condensation.
Write true or false
Dissolving of solute in a solvent and rusting of iron are both physical changes.
Name two reversible changes.
Define a chemical change. Give two examples of the above changes.
Give three reasons why melting of wax, is considered a physical change while burning of a candle, a chemical change.
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.
Select the correct answer from the choice given below to complete the sentence
A change in which a substance retains its identity is a
______ change.
Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and Step II are:
Keeping a stone in sunlight for few hours is ______.
