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प्रश्न
State whether the following is physical or chemical changes.
respiration in living beings —
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उत्तर
chemical change,
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संबंधित प्रश्न
Write true or false
Melting of ice is a physical change.
Fill in the blank.
The process of a liquid changing into a solid is called ________
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.
Select the chemical changes from the following list of changes
Change of seasons
When a woolen yarn is knitted to get a sweater, the change can be classified as ____________.
What is the difference between dissolution of sugar and burning of sugar ?
Assertion: Burning of wood log to charcoal is a physical change.
Reason: The products formed of burning a piece of wood can be easily converted back to wood log.
When solute is dissolved in a solvent it forms a solution.
Classify the following as physical or chemical properties
Metallic sodium is soft enough to be cut with a knife.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
