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Chemistry-

General

Easy

Question

At constant volume and temperature conditions, the rate of diffusion D_A and D_B of gases A and B having densities $rho subscript A$ and $rho subscript B$ are related by the expression,

$D_{A} = {[D_{B} . \frac{ρ_{A}}{ρ_{B}}]}^{1 / 2}$
$D_{A} = {[D_{B} . \frac{ρ_{B}}{ρ_{A}}]}^{1 / 2}$
$D_{A} = D_{B} {(\frac{ρ_{A}}{ρ_{B}})}^{1 / 2}$
$D_{A} = D_{B} {(\frac{ρ_{B}}{ρ_{A}})}^{1 / 2}$

The correct answer is: $D subscript A end subscript equals D subscript B end subscript open parentheses fraction numerator rho subscript B end subscript over denominator rho subscript A end subscript end fraction close parentheses to the power of 1 divided by 2 end exponent$

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