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प्रश्न
Fill in the blank
Changes that occur in nature are called ______
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उत्तर
Changes that occur in nature are called Natural changes.
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संबंधित प्रश्न
Tick the most appropriate answer.
4. Chemical changes involve
- change in shape.
- change in size.
- change in molecular composition.
- none of these
State whether the following is physical or chemical changes.
glowing of a bulb -
State whether the following is physical or chemical change.
Digestion of food —
Classify the following as physical or chemical changes :
Breaking of a glass tumbler
Classify the Following as a Physical Or a Chemical Change.
Formation of Clouds
Classify the Following as a Physical Or a Chemical Change.
Curdling of Milk
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
Ammonium chloride is also a sublimable solid. Give a reason why the sublimation of ammonium chloride involves a physical and a chemical change.
A change in which matter undergoes a change but the total mass of the substance is unaltered is a ______ change.
Give the reason why the following is considered as chemical changes.
Copper carbonate on heat gives copper oxide and carbon dioxide.
