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General Science - Questions and Answers

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216. Which of the following is an non-conventional source of energy ?
A. Coal
B. Oil
C. Biogas
D. None of these
Explanation:
217. The term hydroponics is used to describe
A. sound propagation under water
B. cultivation of plants in water
C. a disease in whihc patient develops fear of water
D. study of electronic devices which work under water
Explanation:
218. Suns heat reaches earth by Which of the following modes of heat transmission ?
A. Conduction
B. Convection
C. Radiation
D. Heat exchange
Explanation:
219. A ship floats on water. This can be explained by
A. Boyles law
B. Newtons laws of motion
C. Raman effect
D. Archimedes principle
Explanation:
220. How should a man wearing spectacles work with a microscope ?
A. He should keep on wearing spectacles.
B. He should take off spectacles.
C. Wearing or taking off makes little difference.
D. He cannot use the microscope at all.
Explanation:
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