| 1. | Which method is used to produce electricity in hydroelectric power plant. ? | |
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By running dynamo by kinetic energy
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By ionizing water
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By boiling the water to produce steam
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Any of the above
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Report Question| 2. | Radiations which are harmful to the living organisms are ? | |
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ultraviolet radiations
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micro waves
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Visible radiation.
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Infrared radiation.
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| 3. | A solar water heater cannot be used to get hot water on ? | |
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a windy day
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a hot day
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a cloudy day
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a sunny day
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| 4. | The major constituent of biogas is methane. ? | |
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A is false but R is true.
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A is true but R is false.
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Both A and R are true but R is not the correct explanation of (a)
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Both A and R are true and R is the correct explanation of (a)
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| 5. | Biogas is formed in the ? | |
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absence of air only
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presence of water and absence of air
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presence of water only
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presence of air only
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| 6. | U-235 will undergo fission by ? | |
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low energy protons only
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medium energy neutrons
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high energy neutrons only
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low energy neutrons only
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| 7. | Acid rain happens because ? | |
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earth atmosphere contains acids
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electrical charges are produced due to friction amongst clouds
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burning of fossil fuels releases oxides of carbon, nitrogen and sulphur in the atmosphere
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Sun heats up the upper layer of the atmosphere
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| 8. | The major constituent of biogas is methane. ? | |
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Both A and R are true but R is not the correct explanation of (a)
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Both A and R are true and R is the correct explanation of (a)
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A is false but R is true.
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A is true but R is false.
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| 9. | Which of following is more environment friendly ? | |
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burning of charcoal
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Burning of diesel
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burning of fire wood
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Burning of coal
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| 10. | Which energy source is the largest source used in India ? | |
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Bio Gas
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Coal
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LPG
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CNG
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