Available Answers

1. 1.

   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. mixture
      3. solution
      4. none of these
   3. A solution in which no substance can be dissolved at a given temperature is called a/an ________________ solution.
      1. saturated
      2. unsaturated
      3. evaporated
      4. immiscible
   4. The heavy solid particles that settle down at the bottom of a solution are called ________________.
      1. decant
      2. filtrate
      3. sediment
      4. distillate
   5. we can separate salt solution and sand by using ________________.
      1. decantation,filtration,evaporation and condensation
      2. evaporation
      3. condensation
      4. sedimentation
   6. During filtration,what do we obtain on the filter paper?
      1. residue
      2. decant
      3. muddy water
      4. filtrate
   7. After harvesting,food grain are separated by ________________.
      1. threshing
      2. hand-picking
      3. winnowing
      4. evaporation
2. 2.

   Fill in the blanks.

   1. A mixture having components of ________________ sizes are separated by the progress 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. the extent to which a substance gets dissolved in a liquid is called its ________________.
   6. Grains and husk can be separated by using ________________.
3. 3.

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

   1. A mixture is a substance which contains two or more substances in definite proportion.
   2. A mixture of chalk powder and chana powder cannot be separated 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 which cannot dissolve any more of a given solute at aa particular temperature.
4. 4.

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

5. 5.

   Define solubility. How can it be increased?

6. 6.

   Soni is helping her mother and accidentally she mixes the arhar dal with gram seeds and rice flour. Her brother helps her in separating the things from each other.

   1. Which method they would have used to separate things?
   2. What value do you learn from Soni's brother?