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प्रश्न
Write true or false
Cutting of paper into pieces is a chemical change.
विकल्प
True
False
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उत्तर
False
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संबंधित प्रश्न
Define physical change. Give two examples for the above changes.
Write true or false
Rusting of iron is a chemical change.
Write true or false
Dissolving of solute in a solvent and rusting of iron are both physical changes.
Classify the following as a physical or a chemical change.
Drying of wet clothes
Give four difference between physical and chemical changes.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
Give the reason why the following is considered as chemical changes.
A piece of magnesium strip is dropped into a beaker containing dilute hydrochloric acid.
Analogy:
Melting of ice: Physical change.
Popping of popcorn: ______.
Grinding of wheat grain changes its size. It is a ____________ change.
Give an example of a physical change in which the color of the substance changes.
