Advertisements
Advertisements
प्रश्न
Name the process which can be used to purify an impure sample of copper sulphate.
Advertisements
उत्तर
An impure sample of copper sulphate can be purified by the process of crystallization.
APPEARS IN
संबंधित प्रश्न
Name the processes involved in two cases.
What are molecules ?
Write true or false for each statement. Rewrite the false statement correctly.
Matter cannot exist in different states.
A kind of matter which can sublime is
When a crystal of potassium permanganate is placed at the bottom of water in a beaker, the water in the whole beaker turns purple on its own, even without stirring. This is an example of :
An inflated balloon full of air goes down slowly (becomes smaller and smaller slowly) even though the knot at the mouth of the balloon is airtight. And after a week all the air has escaped from the balloon. Explain how the air particles got out of the balloon.
What is meant by saying that metals are malleable and ductile ?
What is meant by saying that non-metals are brittle ?
What are pure substances ? Give two examples of pure substances.
What are the three groups into which all the elements can be divided ? Name two elements belonging to each group.
Name a metal which has no fixed shape.
Which of the following are compounds ?
- CO
- No
- NO
- Co
Choose one term from the following which includes the other three :
aerosol, emulsion, colloid, sol
Name the different types of solutions. Give one example of each.
Name the process which can be used to recover salt from an aqueous salt solution.
What is the general name of the process by which tea-leaves are separated from prepared tea ?
Draw a labelled diagram of the fractional distillation apparatus used for separating a mixture of alcohol and water.
Why wires cannot be drawn from materials such as stone or wood?
State whether true or false. If false, correct the statement.
Oil and water are immiscible with each other.
Evaporation is always accompanied by ______ in temperature.
