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Nuclei — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsNuclei1 Mark
MCQ
Radiocarbon is produced in the atmosphere as a result of:
  • ✓
    Collision between fast neutrons and nitrogen nuclei present in the atmosphere.
  • B
    Action of ultraviolet light from the sun on atmospheric oxygen.
  • C
    Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere.
  • D
    Lightning discharge in atmosphere.
✓

Answer

Correct option: A.
Collision between fast neutrons and nitrogen nuclei present in the atmosphere.

Radiocarbon is produced in the atmosphere as result of collision between fast neutrons and nitrogen nuclei present in the atmosphere.
Nuclear reaction is given as:
${ }_7 \mathrm{~N}^{14}+{ }_0 \mathrm{n}^1 \rightarrow{ }_6 \mathrm{C}^{14}+{ }_1 \mathrm{H}^1$

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