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Standard XIII

Chemistry

Application of Radioactivity

In a living o...

Question

In a living organism, the C-14 concentration

remains approximately constant

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continually increases

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continually decreases

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varies unpredictably during the lifetime of the organism

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Solution

The correct option is A
remains approximately constant

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Similar questions

Q. The half life of

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5730

years. What fraction of

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5

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Q. Carbon-14 is used to determine the age of organic material. The procedure is based on the formation of

^{14} C

by neutron capture in the upper atmosphere.

_{7}^{14} N +_{0}^{1} n \to_{6}^{14} C +_{1} P^{1}

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in the dead being, falls due to the decay which C-14 undergoes

_{6}^{14} C \to_{7}^{14} N + β^{-}

The half-life period of

^{14} C

is 5770 yr.
The decay constant

(λ)

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λ = \frac{0.693}{t_{\frac{1}{2}}} .

The comparison of the

β^{-}

activity of the dead matter with that of the carbon still in circulation
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^{14} C

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in living matter is

1 : 10^{12} .

Which of the following option is correct?

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In a living organism, the C-14 concentration

The correct option is A remains approximately constant

The correct option is A
remains approximately constant