Q9 / 160 · TS EAMCET 2018 (04 May Shift 2) · Chemistry
Relative abundance (in percentage) of ${ }^{14} \mathrm{C}$ isotope is
- A1.1
- Correct answerB$2 \times 10^{-10}$
- C$2 \times 10^{-4}$
- D$2 \times 10^{-5}$
Solution
Carbon has mainly three isotopes. C-12, C-13 and $\mathrm{C}-14 . \mathrm{C}-14$ is a radioactive isotope of carbon and present in least quantity, i.e. near about $\left(2 \times 10^{-10}\right)$.
$$
\begin{array}{lll}
{ }^{12} \mathrm{C} & { }^{13} \mathrm{C} & { }^{14} \mathrm{C} \\
98.9 \% & 1.08 \% & 2 \times 10{ }^{10}
\end{array}
$$
Hence, the correct answer is option: 'B'.