Available Answers

1. 1.

   Write T for True and F for False.

   1. Copper sulphate crystals are an example of solids.
   2. In solid state of matter, the molecules are tightly packed.
   3. Petrol is a liquid state as it does not have a fixed shape, but has a fixed volume.
   4. The liquid state of matter can fill the entire space available to it.
   5. Oxygen and nitrogen are solid states of matter.
2. 2.

   Name the following.

   1. The substance that gets dissolved in the solution.
   2. The substance that dissolves the solute particles into it.
   3. The solute in sugar solution is __________________.
   4. An example of solution where both solute and solvent are liquid.
3. 3.

   Fill in the blanks.

   1. The substance that dissolves completely in a liquid, to form a solution is called __________________.
   2. Tea leaves and sand are __________________ substances in water.
   3. __________________ is lost through boiling.
   4. Distilled water is not suitable for __________________.
   5. The process of separating insoluble substances by passing the solution through filter paper is called __________________.
4. 4.

   Write T for True and F for False.

   1. Air is a mixture of several gases such as nitrogen, oxygen, carbon dioxide, etc.
   2. Air contains dust particles and smoke.
   3. Oxygen is taken in by green plants to prepare food.
   4. Nitrogen in air controls the process of burning.
   5. Air has no weight.
   6. A gentle wind is called gale.
   7. The land breeze takes place during daytime.
   8. Summer monsoon wind brings rain in India.
5. 5.

   Choose the correct option to fill in the blank.

   1. Matter is made of molecules that are very ____________ (large/small).
   2. In case of solids, there is ____________ (no/some) space between the molecules.
   3. Copper sulphate crystals are ____________ (solids/liquids)
   4. Solids and ____________ (gases/liquids) have fixed volume.
   5. Solute and ____________ (gas/solvent) makes a solution.
6. 6.

   Match the following.

   1. Gas	i. Soluble in water
   2. Solution	ii. Obtained by distillation process
   3. Chalk	iii. Flows in all direction
   4. Pure water	iv. Insoluble in water
   5. Honey	v. Sugar or salt dissolved in water