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  1. Enriched uranium may contain fissionable contents of the order of

  2. A.

     1-99%

    B.

     1-25%

    C.

     1-50%

    D.

     1-75%

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    Answer : Option A

    Explanation :

    Natural uranium is 99.284% 238U isotope, with 235U only constituting about 0.711% of its mass. 235U is the only nuclide existing in nature (in any appreciable amount) that is fissile with thermal neutrons.


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