TEST PAPER 1
There are 14 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]
- 1 nanometer = ______ cm.
- 10-9
- 10-8
- 10-7
- 10-6
- The most important property of nanomaterials is ______.
- force
- friction
- pressure
- ductility
- For a plane mirror, magnification (m) = ______.
- 0
- 1
- +1 or -1
- <>
- Blue + Green (light) = ______.
- Magenta
- Cyan
- Yellow
- Violet
SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]
- Define : Nanotechnology.
- Define : Principal focus of convex lens.
- Why does a green leaf appear green ?
- Mention the principle of simple microscope.
SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]
- Explain the use of nanotechnology in diagnostics.
- Explain : Regular reflection.
- Explain : Near-sightedness(no diagram).
SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
- Describe the concept of nanotubes.
- Describe subtractive method of mixing of pigments.
SECTION - E : ANSWER IN DETAIL : [5 marks each, Total marks 5]
- Derive mirror formula.
TEST PAPER 2
There are 14 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]
- The equivalent resistance of three resistors, each of 6 Ω, connected in parallel is ______.
- 6 Ω
- 18 Ω
- 2 Ω
- 0.5 Ω
- Which of the following is not correct for the electrical work ?
- W = VQ
- W = VIt
- W = I2Rt
- W = I2RQ
- What is the frequency of current used domestically in India ?
- 50 Hz
- 60 Hz
- 110 Hz
- 220 Hz
- The principle of magnetic induction was given by ______.
- Faraday
- Galileo
- Oersted
- Ampere
SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]
- Define : Electrical potential.
- What causes resistance in a conductor ?
- What is over-loading ?
- What is alternating current(AC) ?
SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]
- State two disadvantages of series connection.
- If 300 mA current passes through a lamp, how many electrons will pass through it in 1 minute ?
- Explain the work(importance) of a fuse.
SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
- Explain the construction and working of a simple Voltaic cell.
- 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]
- Describe Ohm's experiment OR Describe electric motor with neat diagram.
TEST PAPER 4
There are 14 questions in all and time limit is 45 minutes.
SECTION - A : CHOOSE APPROPRIATE ALTERNATIVE : [1 mark each, Total marks 4]
- Formation of petroleum in earth's crust is a ______ reaction.
- geochemical
- biochemical
- physiochemical
- physical
- Pyrex glass is ______.
- plasticized glass
- polymeric glass
- heat-resistant glass
- opaque glass
- Ethylethanoate is ______.
- an alcohol
- an acid
- an ester
- a ketone
- Which of the following is not an oxidising agent ?
- NaBH4
- KMnO4
- Cr2O3
- Fehling's solution
SECTION - B : ANSWER IN SHORT : [1 mark each, Total marks 4]
- Define : Rate of reaction.
- State the Law of Mass-Action.
- Who prepared Portland cement for the first time ? When ?
- What is formalin ?
SECTION - C : ANSWER IN BRIEF : [2 marks each, Total marks 6]
- Explain : Molarity.
- Describe manufacture of lime.
- Show that the H atom in the -COOH group has acidic nature.
SECTION - D : ANSWER THE FOLLOWING : [3 marks each, Total marks 6]
- Describe Ammonia-Soda process to obtain washing soda.
- 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]
- Write a detailed note on pH.