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Standard XII

Chemistry

Abundance and Isotopes

Assertion :Th...

Question

Assertion :The activity of $1$ $g$ pure uranium- $235$ will be greater than the same amount present in $U_{3} O_{6}$ . Reason: In the combined state, the activity of the radioactive element decreases.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
$$ In the combined state, the activity of the radioactive element is not affected.
Hence. both Assertion and Reason are incorrect.
$$ Activity of 1g pure uranium -235 will be same for the same amount present in $U_{3} O_{8}$ .

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Assertion :The activity of 1 g pure uranium-235 will be greater than the same amount present in U3O6. Reason: In the combined state, the activity of the radioactive element decreases.

The correct option is D Both Assertion and Reason are incorrect∗In the combined state, the activity of the radioactive element is not affected.Hence. both Assertion and Reason are incorrect.∗Activity of 1g pure uranium -235 will be same for the same amount present in U3O8.

Assertion :The activity of $1$ $g$ pure uranium- $235$ will be greater than the same amount present in $U_{3} O_{6}$ . Reason: In the combined state, the activity of the radioactive element decreases.

The correct option is D Both Assertion and Reason are incorrect
$$ In the combined state, the activity of the radioactive element is not affected.
Hence. both Assertion and Reason are incorrect.
$$ Activity of 1g pure uranium -235 will be same for the same amount present in $U_{3} O_{8}$ .