Advertisements
Advertisements
प्रश्न
Name the following.
The product of the chemical change in keeping a polished iron nail exposed to the atmosphere.
Advertisements
उत्तर
Iron III oxide [Fe2O3x H20]
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer.
4. Chemical changes involve
- change in shape.
- change in size.
- change in molecular composition.
- none of these
Tick (√) the correct alternative from the choice given for the following statement
A pop sound is heard when a lighted match stick is brought near the mouth of a jar. This indicates the release of gas.
State one instance where water undergoes a physical change and one in which it undergoes a chemical change.
Classify the Following as a Physical Or a Chemical change.
Glowing of an Electric Bulb
Given reason:
Cutting of a cloth piece is a physical change, though it cannot be reversed.
What will you take into account while identifying the following?
A chemical change in a substance.
Give four reasons why the burning of a magnesium ribbon in the air is considered a chemical change.
State which of the following 1 to 5 pertain to – A: Physical Change B: Chemical change :
- Sublimation.
- Fermentation.
- Liquefaction or condensation.
- Magnetization.
- Respiration.
What type of change is colouring of a paper?
State whether the following statement is true or false:
Stretching of rubber bands is not a physical change.
