Advertisements
Advertisements
प्रश्न
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:
विकल्प
physical and chemical changes respectively.
chemical and physical changes respectively.
both physical changes.
both chemicals change.
उत्तर
both physical changes.
Explanation:
Dissolution of copper sulphate powder in water in presence of sulphuric acid is a physical change. On cooling this hot solution, the crystals of copper sulphate are separated, This is also a physical change.
APPEARS IN
संबंधित प्रश्न
Write true or false
Earthquake is a desirable change.
Tick (√) the correct alternative from the choice given for the following statement.
An example of both physical and chemical change is
Fill in the blank
Heat is ________ by a gas during the process of condensation.
Write true or false
Burning of paper and formation of curd are reversible changes.
State the various conditions that favour the process of evaporation.
Which of the following are physical changes ?
- melting of iron metal
- rusting of iron metal
- bending of an iron rod
- drawing a wire of iron metal
Classify the following as a physical or a chemical change.
Manufacture of salt from sea water
Name the following:
The type of change physical or chemical involved – ‘when a substance undergoes a change in state, colour or size’.
Select the chemical changes from the following list of changes
The carbon cycle.
Which of the following is not a physical change?
