1.

Assertion : The activity of 1 g pure uranium -235 will be greater than the same amount present as U_(3)O_(8) Reaosn : In the combined state, the activity of the radioactive element decreases

Answer»

If both assertion and REASON are true and the reason is the correct explanation of the assertion
If both assertion and reason are true but reason is not the correct explanantion of the assertion
If assertion is true but reason is false
If the assertion and reason both are false

Solution :Radioactivity of an ELEMENT is independent of its physical state its chemical environment or temperature, suggesting that it is a PROPERTY of nucleus i.e., nuclear PHENOMENON.


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