Available Answers

1. 1.

   Fill in the blanks :

   1. Anything which occupies space and has mass is called _________________.
   2. The smallest unit of an element is _________________ which may or may not exist in _________________.
   3. The smallest unit of matter that exists _________________ in nature is called _________________.
   4. Molecules of a substance are always in a state _________________ of _________________ and so they possess _________________.
   5. Force of cohesion is maximum in _________________, less in _________________ and the least in _________________ less in _________________.
   6. Intermolecular space is maximum in _________________, less in _________________ and the least in _________________.
   7. Intermolecular force of attraction is maximum in _________________, less in _________________ and the least in _________________.
   8. The free surface of a liquid behaves like a stretched membrane due to _________________.
   9. Ail the molecules of a substance are _________________.
   10. The meniscus of water in a narrow glass tube is _________________, whereas that of mercury is _________________.
2. 2.

   Tick the most appropriate answer :

   1. The intermolecular force is maximum in case of :
      1. solids
      2. gases
      3. liquids
      4. none of the above
   2. The intermolecular space is maximum in case of :
      1. liquids
      2. solids
      3. gases
      4. none of the above
   3. The molecules can move freely anywhere in
      1. gases
      2. liquids
      3. solids
      4. none of the above
   4. The molecules do not move within the boundary of : 
      1. liquids
      2. gases
      3. solids
      4. none of the above
   5. After absorbing heat, the molecules move from the hot end to the cold end due to
      1. conduction
      2. convection
      3. radiation
      4. none of the above
   6. After absorbing heat, the molecules vibrate more frequently about their Incan position and transfer their energy to the surrounding molecules in case of :
      1. convection
      2. conduction
      3. absorption
      4. none of the above
   7. The intermolecular forces of attraction in liquids are :
      1. less than in gases
      2. more than in solids
      3. same as in solids
      4. less than in solids
3. 3.

   Define the term matter.

4. 4.

   Define molecule and give an example.

5. 5.

   What is force of cohesion?

6. 6.

   What is the force of adhesion?