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.

TEST PAPER 2

UNIT 2 - 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. The equivalent resistance of three resistors, each of 6 Ω, connected in parallel is ______.
   
   
   
   1. 6 Ω
   2. 18 Ω
   3. 2 Ω
   4. 0.5 Ω
      
   
   
2. Which of the following is not correct for the electrical work ?
   
   
   
   1. W = VQ
   2. W = VIt
   3. W = I²Rt
   4. W = I²RQ
      
   
   
3. What is the frequency of current used domestically in India ?
   
   
   
   1. 50 Hz
   2. 60 Hz
   3. 110 Hz
   4. 220 Hz
      
   
   
4. The principle of magnetic induction was given by ______.
   
   
   
   1. Faraday
   2. Galileo
   3. Oersted
   4. Ampere
      
   
   

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

   
   
5. Define : Electrical potential.
6. What causes resistance in a conductor ?
7. What is over-loading ?
8. What is alternating current(AC) ?
   

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

   
   
9. State two disadvantages of series connection.
10. If 300 mA current passes through a lamp, how many electrons will pass through it in 1 minute ?
11. Explain the work(importance) of a fuse.
    

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

    
    
12. Explain the construction and working of a simple Voltaic cell.
13. Explain the experiment to show the presence of magnetic field due to electric current.
    

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

    
    
14. Describe Ohm's experiment OR Describe electric motor with neat diagram.

TEST PAPER 4

UNIT 4 - 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. Formation of petroleum in earth's crust is a ______ reaction.
   
   
   
   1. geochemical
   2. biochemical
   3. physiochemical
   4. physical
      
   
   
2. Pyrex glass is ______.
   
   
   
   1. plasticized glass
   2. polymeric glass
   3. heat-resistant glass
   4. opaque glass
      
   
   
3. Ethylethanoate is ______.
   
   
   
   1. an alcohol
   2. an acid
   3. an ester
   4. a ketone
      
   
   
4. Which of the following is not an oxidising agent ?
   
   
   
   1. NaBH₄
   2. KMnO₄
   3. Cr₂O₃
   4. Fehling's solution
      
   
   

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

   
   
5. Define : Rate of reaction.
6. State the Law of Mass-Action.
7. Who prepared Portland cement for the first time ? When ?
8. What is formalin ?
   

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

   
   
9. Explain : Molarity.
10. Describe manufacture of lime.
11. Show that the H atom in the -COOH group has acidic nature.
    

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

    
    
12. Describe Ammonia-Soda process to obtain washing soda.
13. Write chemical properties of formaldehyde giving chemical equations. OR Describe preparation of polyamides(nylon) and give its two uses.
    

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

    
    
14. Write a detailed note on p^H.