General Science - Questions (Section-3)
1Atoms are composed of
A. electrons and protonsB. electrons only
C. protons only D. electrons and nuclei
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2In an atomic explosion, enormous energy is released which is due to
A. conversion of chemical energy into heat energyB. conversion of mechanical energy into nuclear energy
C. conversion of mass into energy D. conversion of neutrons into protons
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3Isotopes are separated by
A. crystallisationB. sublimation
C. distillation D. filtration
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4Which among the following is a positively charged particle emitted by a radioactive element?
A. Beta rayB. Alpha ray
C. Cathode ray D. Gamma ray
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5Which of the following is used as a moderator in nuclear reactor?
A. ThoriumB. Graphite
C. Radium D. Ordinary water
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