Advertisements
Advertisements
प्रश्न
Wood to sawdust:______:: Wood to Ash: Chemical change
उत्तर
Wood to sawdust: Physical change. :: Wood to Ash: Chemical change
APPEARS IN
संबंधित प्रश्न
Tick the most appropriate answer.
5. Photosynthesis requires
- heat energy.
- wind energy
- sunlight.
- sound energy
Classify the following changes as physical or chemical:- photosynthesis in plants
Tick (√) the correct alternative from the choice given for the following statement.
An example of both physical and chemical change is
State one instance where water undergoes a physical change and one in which it undergoes a chemical change.
Is a change of state of matter – a physical or a chemical change. Give reasons.
Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then a 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:
A physical change is generally____________.
If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.
Do you think rust is different from iron?
Cutting a log of wood into pieces is a chemical change.
Mention a few physical properties of a substance.
