Build a question paper in 60 seconds.

1. A
   Large scale deforestation
2. B
   Exploitation of forest produce
3. C
   Maintaining sacred groves
4. D
   Encroachment in forest areas

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1. A
   Afforestation
2. B
   Loss of forests
3. C
   Excessive pumping of groundwater
4. D
   Construction of large scale concrete buildings

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1. A
   Microwaves
2. B
   Infra-red
3. C
   Visible light
4. D
   X-rays

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1. A
   Refractometer
2. B
   Galvanometer
3. C
   Viscometer
4. D
   Diffractometer

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1. A
   Carbon dioxide
2. B
   Methane
3. C
   Hydrogen
4. D
   Hydrogen sulphide

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1. A
   Reflection
2. B
   Total internal reflection
3. C
   Scattering
4. D
   Interference

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1. A
   The lens is concave and has a focal length of 0·5 metre
2. B
   The lens is convex and has a focal length of 2·0 metre
3. C
   The lens is convex and has a focal length of 0·5 metre
4. D
   The lens is concave and has a focal length of 2·0 metre

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1. A
   Carbon dioxide
2. B
   Hydrogen
3. C
   Water vapour
4. D
   Oxygen

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1. A
   5, 10 and 2 respectively
2. B
   10, 2 and 5 respectively
3. C
   5, 2 and 10 respectively
4. D
   2, 5 and 10 respectively

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1. A
   Yellow – pink – blue
2. B
   Yellow – reddish brown – yellow
3. C
   Yellow – reddish brown – blue
4. D
   Yellow – blue – pink

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1. A
   Both are inorganic compounds
2. B
   Both are organic compounds
3. C
   Both contain chlorine
4. D
   Both contain calcium

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1. A
   Silica gel
2. B
   Polystyrene
3. C
   Sodium chloride
4. D
   Sodium carbonate

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1. A
   Sulphuric acid
2. B
   Hydrochloric acid
3. C
   Nitric acid
4. D
   Phosphoric acid

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1. A
   $v_q > v_s$
2. B
   $v_s > v_q$
3. C
   $v_s = v_q$
4. D
   $v_s = \frac{v_q}{2}$

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1. A
   The image will be virtual
2. B
   The image will be enlarged or magnified
3. C
   The image will be formed at infinity
4. D
   The image will be erect

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