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The quantity which is not conserved in a nuclear reaction is

Question and options

The quantity which is not conserved in a nuclear reaction is
  1. Momentum
  2. Charge
  3. Mass
  4. Nucleon number

Answer and explanation

Correct answer: C - Mass
In nuclear reactions charge, linear momentum and nucleon (mass) number are conserved, but rest mass is not: the mass defect appears as energy (E=mc2E = mc^2). So mass is the quantity not conserved.

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