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JEE MAIN 2020
05-09-2020 S1
Question
A diatomic molecule $X_2$ has a body-centred cubic (bcc) structure with a cell edge of 300 pm . The density of the molecule is $6.17 \mathrm{~g} \mathrm{~cm}^{-3}$. The number of molecules present in 200 g of $\mathrm{X}_2$ is :
Select the correct option:
A
$40 \mathrm{~N}_{\mathrm{A}}$
B
$4 \mathrm{~N}_{\mathrm{A}}$
C
$2 \mathrm{~N}_{\mathrm{A}}$
D
$8 N_A$
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