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प्रश्न
State whether the following is physical or chemical changes.
mixing oil with water —
उत्तर
physical change.
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संबंधित प्रश्न
Melting of solid (wax) is a physical change.
What do you observe when :
lighted match stick is brought near the mouth of the test tube containing hydrogen gas.
Write true or false
Burning of sugar is a temporary change.
Tick the most appropriate answer.
Photosynthesis requires
Separate the following into physical and chemical changes :
Sublimation of a solid, Decomposition of water into hydrogen and oxygen by passing electric current, Formation of clouds, Making a fruit salad from raw fruits, Dissolving carbon dioxide in water
Classify the Following as a Physical Or a Chemical Change.
Making of a Sugar Solution
Name the following.
The product of the chemical change in keeping a polished iron nail exposed to the atmosphere.
Digestion of food is a physical change.
Filling up a balloon with hot air is a _______ change.
Match the following
| Sr. No. | A | B | C |
| 1. | Melting | Change of state from liquid to solid | Ticking of clock |
| 2. | Condensation | Change of state from liquid to gas | Formation of ice cube |
| 3. | Evaporation | Change of state from solid to liquid | Collecting flowers |
| 4. | Freezing | Change of state from gas to liquid | Ice cube to water |
| 5. | Periodic change | Occurs at irregular time intervals | Water to steam |
| 6. | Non-periodic change | Occurs at regular time intervals | Steam to water drops |
