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प्रश्न
State whether the following is physical or chemical changes.
glowing of a bulb -
उत्तर
physical change,
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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
Fill in the blank
change in which the substance can be brought back to its original state is called a ............... change.
State the differences between a physical change and a chemical change.
Is burning a physical change or a chemical change? Why?
Fill in the blank.
A change, which alters the composition of a substances, is known as a___________ change.
What will you take into account while identifying the following?
A chemical change in a substance.
Differentiate between a physical change and a chemical change with reference to – Energy change taking place during the respective change.
Give a reason why – Addition of zinc nitrate to water is a physical change but, the addition of zinc to dilute nitric acid is a chemical change.
Give the reason why the following is considered as chemical changes.
Sulphur when burnt in air evolves a gaseous acidic product.
Distinguish physical and chemical changes.
