TEST PAPER 1

UNIT 1 - 25 MARKS

There are 14 questions in all and time limit is 45 minutes.

SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]

1. 1 nanometer = ______ cm.
   
   
   
   1. 10^-9
   2. 10^-8
   3. 10^-7
   4. 10^-6
      
   
   
2. The most important property of nanomaterials is ______.
   
   
   
   1. force
   2. friction
   3. pressure
   4. ductility
      
   
   
3. For a plane mirror, magnification (m) = ______.
   
   
   
   1. 0
   2. 1
   3. +1 or -1
   4. <>
   
   
4. Blue + Green (light) = ______.
   
   
   
   1. Magenta
   2. Cyan
   3. Yellow
   4. Violet
      
   
   

   SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]

   
   
5. Define : Nanotechnology.
6. Define : Principal focus of convex lens.
7. Why does a green leaf appear green ?
8. Mention the principle of simple microscope.
   

   SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]

   
   
9. Explain the use of nanotechnology in diagnostics.
10. Explain : Regular reflection.
11. Explain : Near-sightedness(no diagram).
    

    SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]

    
    
12. Describe the concept of nanotubes.
13. Describe subtractive method of mixing of pigments.
    

    SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]

    
    
14. Derive mirror formula.