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 pH.
 

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