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प्रश्न
Classify the following as chemical or physical change:
Making a fruit salad with raw fruits
विकल्प
Chemical change
Physical change
उत्तर
Physical change
Explanation:
Making a fruit salad with raw fruits is a physical change because the fruits' chemical properties do not change; only their physical appearance has altered.
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संबंधित प्रश्न
Tick the most appropriate answer.
5. Photosynthesis requires
- heat energy.
- wind energy
- sunlight.
- sound energy
Match the columns
| column A | coulmn B |
| 1. A change which cannot be easily reversed | a. man-made change |
| 2.A change that repeats itself at regular intervals | b. chemical change |
| 3. A change that is made by humans | c. physical change |
|
4. A change in which the original substance cannot be obtained |
d. periodic change |
| 5. A change where no new substance is formade | e. irreversible change |
| f. slow change |
State whether the following is physical or chemical changes.
(energy produced) dissolving sugar in water —
Classify the following as physical or chemical changes :
Breaking of a glass tumbler
Which of the following are physical changes and which are chemical changes?
Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper.
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.
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
______ is the substance that is dissolved in a solvent.
Analogy:
Melting of ice: Physical change.
Popping of popcorn: ______.
Give two examples for each of the following cases:
Physical changes which are not reversible.
