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Question

Which of the following is the radioactive isotope of carbon?

A
12C
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B
13C
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C
14C
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D
None of the above
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Solution

The correct option is C 14C
Naturally occuring carbon has 3 isotopes - 12C, 13C and 14C
Among the 3 isotopes, 12C and 13C isotopes are stable isotopes while 14C is a radioactive isotopes with half life period of 5770 years. This isotope is used in carbon dating and carbon labelling.

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