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प्रश्न
Which of the following is a physical change?
पर्याय
Rusting of iron
Combustion of magnesium ribbon
Burning of candle
Melting of wax
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उत्तर
Melting of wax
Explanation:
Melting of wax is a physical change. All other changes are chemical changes.
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संबंधित प्रश्न
Classify the following as chemical or physical change:
Dissolving common salt in water.
State whether the following is physical or chemical changes.
respiration in living beings —
State whether the following is physical or chemical changes.
mixing oil with water —
Write true or false
Burning of sugar is a temporary change.
Make a list of different types of changes with example.
Classify the following as a physical or a chemical change.
Butter getting rancid
Read the paragraph and note down the various types of changes it mentions.
It was nearing six o'clock in the evening. The sun was setting. A breeze was blowing. Leaves on the tree were shaking. Sahil was sitting in the courtyard, rolling balls of wet soil, and shaping them into various toys. Then he felt hungry and went into the house. Mother made a dough from wheat flour and fried purees. While eating hot purees, his attention was drawn outside the window. It had started raining. There was lightning, too. Sahil was enjoying his dinner in the dim light.
State why addition of sodium chloride to water is considered a physical change, while addition of dilute sulphuric acid to zinc is considered a chemical change.
What type of change is colouring of a paper?
Mention a few physical properties of a substance.
