What is the average speed of a molecule, having a molecular mass of $529.5 k g m o l^{- 1}$ . At temperature 100 K:

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Solution

The correct option is B 2
$u_{a v} = \sqrt{\frac{8 R T}{π M}}, T = 100 K; M = 529.5 k g m o l^{- 1}$

$= \frac{8 \times 8.314 \times 100}{3.14 \times 529.5} = 2$

$∴$ Average speed of molecule is 2

Hence, the correct option is $B$

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