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प्रश्न
Which of the following are physical changes?
(i) Melting of iron metal
(ii) Rusting of iron
(iii) Bending of an iron rod
(iv) Drawing a wire of iron metal
पर्याय
(i), (ii) and (iii)
(i), (ii) and (iv)
(i), (iii) and (iv)
(ii), (iii) and (iv)
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उत्तर
(i), (iii) and (iv)
Explanation:
Melting of iron metal, bending of an iron rod and drawing a wire of iron metal is physical changes since no new substances are formed during these changes. Only rusting of iron is a chemical change since new substance rust is formed.
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संबंधित प्रश्न
Fill in the blank
Mixtures can be ________ or _______
Compare the properties of metals and non-metals with respect to
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- ductility
- electrical conductivity.
List five characteristics by which compounds can be distinguished form mixtures.
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Define the following:
Pure substance
Define the following:
Homogeneous mixture
Define Immiscible liquids
Tick (√) the correct alternative from the choice given for the following statement:
A heterogeneous mixture is
Name the following:
A physical method of separating iron from an iron-sulfur mixture.
Suggest separation technique(s) one would need to employ to separate the following mixture.
Mercury and water
