The isotope of Uranium used in atomic reactors is –

A. U^235 (2)
B. U^236
C. U^237
D. U^232
Answer» A. U^235 (2)
Explanation: A nuclear reactor is a device to initiate and control a sustained nuclear chain reaction. Most commonly they are used for generating electricity and for the propulsion of ships. Usually heat from nuclear fission is passed to a working fluid (water or gas), which runs through turbines that power either ship's propellers or generators. Some produce isotopes for medical and industrial use, and some are run only for research. When a large fissile atomic nucleus such as U235 or U239 absorbs a neutron, it may undergo nuclear fission.
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