Available Answers

1. 1.

   Tick (√) the correct options:

   1. The process of winnowing can be used to separate _______________.
      1. rice and stones
      2. common salt and sand
      3. kerosene and water
      4. corn and husk
   2. Tiny pieces of stones are separated from pulses by the method called _______________.
      1. threshing
      2. hand-picking
      3. winnowing
      4. sieving
2. 2.

   Tick (√) the correct options:

   1. Mud from water can be separated by _______________.
      1. sieving
      2. filtration
      3. winnowing
      4. condensation
   2. During filtration, the clear liquid obtained is called _______________.
      1. sediment
      2. decant
      3. filtrate
      4. distillate
3. 3.

   Tick (√) the correct options:

   1. A soluble solid from a mixture of solid and liquid is obtained by _______________.
      1. filtration
      2. condensation
      3. evaporation
      4. decantation
   2. What is formed when we dissolve a substance in water?
      1. solute
      2. solvent
      3. solution
      4. none of these
   3. A solution in which no more substance can be dissolved at a given temperature is called a/an _______________ solution.
      1. saturated
      2. unsaturated
      3. evaporated
      4. immiscible
   4. The heavy insoluble particles that settle down at the bottom of a solution is called _______________.
      1. decant
      2. filtrate
      3. sediment
      4. distillate
   5. Which of the following process(es) should be used to separate salt and sand from their mixture?
      1. filtration, evaporation and condensation
      2. evaporation
      3. condensation and sedimentation
      4. sedimentation
   6. During filtration, what do we obtain on the filter paper?
      1. residue
      2. decant
      3. filtrate
      4. none of these
   7. After harvesting, food grains are separated by _______________.
      1. threshing
      2. hand-picking
      3. winnowing
      4. evaporation
4. 4.

   Fill in the blanks:

   1. A mixture having components of _______________ sizes are separated by the process of sieving.
   2. Solubility of salt in water _______________ on heating the solution.
   3. _______________ and _______________ can be used for separating insoluble solid from liquid.
   4. _______________ is used to separate stones and pebbles from sand at construction sites.
   5. _______________ method is used to obtain liquid from its solution.
   6. Grains and husk can be separated by using _______________.
5. 5.

   State whether the following statements are true (T) or false (F). Rewrite the false statements correctly.

   1. A mixture is a substance that contains two or more substances in definite proportion.
   2. Chalk powder and chana powder cannot be separated from their mixture by sieving.
   3. We use a tissue paper to separate filtrate from residue.
   4. The process of separating water from sugar solution involves only condensation.
   5. An unsaturated solution is one that cannot dissolve any more of a given solute at a particular temperature.
6. 6.

   Name the method by which we can separate seeds and pulp from the fruit juice.