61.
Solar eclipse will take place when
A. the sun is between the moon and the earth
B. the earth is between the moon and the sun
C. the moon is between the sun and the earth
D. the moon does not lie on the line joining the sun and the earth
Answer & Explanation
Answer: Option C
Explanation:
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62.
Isotopes of an element contain
A. the same number of protons but different number of neutrons
B. the same number of neutrons but different number of protons
C. equal number of protons and electrons
D. equal number of nucleons
Answer & Explanation
Answer: Option A
Explanation:
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63.
One watt-hour is equivalent to
A. 6.3 x 103 J
B. 6.3 x 10-7 J
C. 3.6 x 103 J
D. 3.6 x 10-3 J
Answer & Explanation
Answer: Option C
Explanation:
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64.
Sir C.V. Raman was awarded Nobel Prize for his work connected with which of the following phenomenon of radiation?
A. Scattering B. Diffraction
C. Interference D. Polarization
Answer & Explanation
Answer: Option A
Explanation:
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65.
In which of the following industries is mica as a raw material?
A. Cement
B. Glass and Pottery
C. Iron and Steel
D. Electrical
Answer & Explanation
Answer: Option D
Explanation:
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66.
Radiocarbon dating technique is used to estimate the age of
A. rocks B. monuments
C. soil D. fossils
Answer & Explanation
Answer: Option D
Explanation:
No answer description available for this question.