NEET UG CHEMISTRY MCQ: CHEMICAL KINETICS

1 Hard

1 of 1

Analyzing +4 | -1

A mixture of

{ }^{239} \mathrm{Pu}

and

{ }^{240} \mathrm{Pu}

has specific activity of

6 \times

10^9(\mathrm{dps}) \mathrm{gm}^{-1}

. The half-life of the isotopes are

2.44 \times 10^4

years (for

{ }^{239} \mathrm{Pu}

) and

6.58 \times 10^3

years (for

{ }^{240} \mathrm{Pu}

) respectively. Determine the isotropic composition of this sample in nearest possible integers.

View answer and explanation

Correct option: A

The correct answer is 39 because it represents the approximate percentage of Plutonium-239 in the mixture, calculated using the specific activity and half-lives of the isotopes.

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\left( {{{E'}_a}\;\mathrm{and}\;{{E''}_a}} \right)

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