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प्रश्न
Write true or false
Burning of sugar is a temporary change.
विकल्प
True
False
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उत्तर
False
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संबंधित प्रश्न
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
State whether the following is physical or chemical changes.
photosynthesis —
Tick (√) the correct alternative from the choice given for the following statement.
A substance which can not sublime is
Write true or false
Dissolving of solute in a solvent and rusting of iron are both physical changes.
State the various conditions that favour the process of evaporation.
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.
Name the following:
The term involved in the change of state from – ‘water to ice’ – which is a physical change.
Select the chemical changes from the following list of changes
Boiling of milk.
What is the difference between dissolution of sugar and burning of sugar ?
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
