Science

Q.1. In mammals, an important role of  excretion is  played by
A. Large intestine
B. Kidneys
C. Lungs
D. Liver
Ans. Kidneys
Q.2. Which of the following caused radioactive pollution along the coast of Kerela?
A. Plutonium
B. Zinc
C. Thorium
D. Radium
Ans. Thorium

Q.3. Chernobyl disaster is the result of pollution by
A. Oil Spill
B. Acid rain
C. Carbon dioxide
D. Radioactive waste
Ans. Radioactive waste

Q.4. The washing machine works on the principle of
A. Dialysis
B. Diffusion
C. Reverse Osmosis
D. Centrifugation
Ans. Centrifugation

Q.5. Every hot objects emits
A. X rays
B. Visible rays
C. Infrared rays
D. UV rays
Ans. Infrared rays

Q.6. Which of the following is the mode of propagation of heat from the sun to the earth?
A. Conduction 
B. Convection alone 
C. Radiation alone 
D. Convection and radiation
Ans. Radiation

Q.7. The main pollutant responsible for Bhopal gas tragedy is
A. Methyl isocyanate
B. Bromine
C. Choloro fluoro carbon
D. Chlorine
Ans. Methyl isocyanate

Q.8. Mach number is used in connection with the speed of
A. Aircraft
B. Spacecraft
C. Ships
D. None
Ans. Aircraft

Q.9. The kind of soil water most useful to plants is
A. Capillary water
B. Distilled water
C. Gravitational water
D. Hygroscopic
Ans. Capillary water

Q.10. Two forms of oxygen found in atmosphere are
A. Ozone and oxygen
B. Water and oxygen
C. Water and carbon dioxide
D. Water and ozone
Ans. Ozone and oxygen
Ace2Three

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