Question

6. Which of the following technique to be used to separate chalk from the mixture of chalk
and water?
a. Filtration
b. Sedimentation
c. Evaporation
d. Sieving
7. Which statement is not true for elements?
a. Elements are pure substances.
b. Elements can be broken to simpler substances by physical methods.
C. Elements are made of one type of particles.
d. Elements may occur both in free and combined state.
8. A solution of sugar and water is a:
a. homogeneous mixture
b. heterogeneous mixture
C. pure substance
d. None of these
9. An element is made up of:
a. one kind of atoms
b. different kinds of atoms
c. different kinds of molecules
d. none of these

10. A mixture of sand and iron filings can be separated by:
a. filtration
b. hand-picking C. magnet
11. Common salt is recovered from sea-water by the process of:
d. sieving
a. filtration
b. sedimentation
C. condensation
d. evaporation​

Answer 1

1. filtration
2. Elements can be broken to simpler substances by physical methods.
3. homgeneous mixture
4. one kind of atoms
5. magnetic force
6. evaporation