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प्रश्न
Fill in the blank
Chemical change occurs as a result of __________ between two substances.
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उत्तर
Chemical change occurs as a result of rearrangement of atoms between two substances.
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संबंधित प्रश्न
Photosynthesis cannot take place at night.
True or false
Change of seasons is a non-periodic change.
True or false
In a physical change no net energy change is involved.
Fill in the blank
Changes that occur in nature are called ______
Classify the following as physical or chemical change :
Condensation of steam
Classify the Following as a Physical Or a Chemical Change.
Curdling of Milk
State which of the following 1 to 5 pertain to – A: Physical Change B: Chemical change :
- Sublimation.
- Fermentation.
- Liquefaction or condensation.
- Magnetization.
- Respiration.
Name the following.
The product obtained during a physical change when water converts from a liquid into a solid.
Higher order Thinking question
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and Step II are:
