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Two radioactive substance X and Y initia...

Two radioactive substance `X` and `Y` initially contain equal number of nuclei. `X` has a half life of `1` hour and `X` has a half-life of `2` hours. After the ratio of activity of `X` to that of `y` is

A

`1:4`

B

`1:2`

C

`1:1`

D

`2:1`

Text Solution

Verified by Experts

The correct Answer is:
C
`A+lamdaN`
`A_(x)=(2lamda)(N_(0))/4=(lamdaN_(0))/2`
`A_(y)=lamda(N_(0))/2=(lamdaN_(0))/2`
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