1. The principle of cleaning by soap is
A. Surface tension
B. floatation
C. viscosity
D. elasticity

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2. The function of heavy water in nuclear reactor is
A. increase the speed of nutrons
B. slow down the speed of nutrons
C. cool down the reactor
D. Stop the nuclear reaction
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3. Light Emitting Diode (LED) converts
A. light energy into electrical energy
B. electrical energy into light energy
C. mechanical energy into electrical energy
D. thermal energy into electrical energy
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4. The Dynamo Converts-
A. mechanical energy into electrical energy
B. electrical energy into mechanical energy
C. Mechanical energy into magnetic energy
D. none of the above
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5. Which of the following is absolute zero temperature
A. 0°C
B. -273 K
C. -273°C
D. -300°C
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6. One carbon credit is equivalent to
A. 10kg of CO2
B. 100Kg of CO2
C. 1000 Kg of CO2
D. 10,000 Kg of CO2

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7. The main constituent of bio-gas is
A. Hydrogen
B. Methene
C. Propane
D. Butane
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8. The urine Sample of diabetic patient contains
A. sucrose
B. fructose
C. glucose
D. all of the above
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9. Which one of the following gas is most responsible for global warming?
A. Nitrogen
B. Methane
C. Carbon dioxide
D. Carbon monoxide
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10. Which of the following gas protect us from ultra-violet ray, coming from the Sun?
A. Ozone gas
B. Oxigen
C. Hydrogen
D. Nitrogen
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