Question

1. Answer the following questions in one word or one sentence:
1. What name is given to the pure substances present in a mixture?
2. Name a device used to separate a mixture of sand and small iron nails.
3. Which method is used to separate grains from stalks?
4. Name the process by which water is separated from rice and pluses after washing them.
5. What method will you use to separate copper sulphate from its solution?
6. Can we separate the flour and the powdered chalk by sieving?
2. Define the following terms:
1. Sediment
2. Supernatant liquid
3. Condensation
4. Sieving
3. Answer the following questions in short:
1. How will obtain clear water from a sample of muddy water?
2. Why is it necessary to separate the components of a mixture?
3. How can solubility of a substance be increased?
4. How will you separate husk or dirt particles from a given sample of pulses before cooking?
5. What will happen if the saturated solution of a substance in water are heated and cooled?​

Answer 1

Answer:

1. solute or solvent
2. magnet
3. winnowing
4. filtration
5. ... don't know
6. no