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Question

If the rate of diffusion of A is 5times that of B, what will be the density ratio of A and B?


A

15

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B

5

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C

25

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D

125

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Solution

The correct option is D

125


Explanation for the correct option.

Compute the required density ratio.

Given: The rate of diffusion of A is 5times that of B.

We know that rate of diffusion is inversely proportional to the square root of its density.

So, rArB=dBdA where, dA,dB are the densities of respective mediums.

5rBrB=dBdA251=dBdAdBdA=125

Hence the density ratio of A and B is 125.

Therefore, Option D is the correct answer.


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