Q106 / 180 · AIIMS 2005 · Physics

Assertion : It is not possible to use ${ }^{35} \mathrm{Cl}$ as the fuel for fusion energy. Reason : The binding energy of ${ }^{35} \mathrm{Cl}$ is too small.

  • A
    If both assertion and reason are true and reason is the correct explanation of assertion
  • B
    If both assertion and reason are true but reason is not the correct explanation of assertion
  • Correct answer
    C
    If assertion is true but reason is false
  • D
    If both assertion and reason are false.

Solution

The process of nuclear fusion can be explained with the help of concept of binding energy per nucleon of very light nuclei and the intermediate nuclei. Binding energy per nucleon of very light nuclei is less than that of intermediate nuclei. It means light nuclei are less stable than that of intermediate nuclei. $\mathrm{As}{ }^{35} \mathrm{Cl}$ has a large binding energy therefore it cannot be used as fuel for fusion energy.

Hence, the correct answer is option: 'C'.

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