JEE Main 2017 · 9 Apr · Shift 1 · Chemistry Q34

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ChemistrySingle correct+4 / -1Question 34 of 90

At 300 K, the density of a certain gaseous molecule at 2 bar is double to that of dinitrogen ( $\ce{N2}$ ) at 4 bar. The molar mass of gaseous molecule is :

28 g mol

^{-1}

56 g mol

^{-1}

112 g mol

^{-1}

224 g mol

^{-1}

Answer and worked solution

Official answer: C

$\rho=\dfrac{PM}{RT}$ , so $M\times2=2\times(28\times4)$ and $M=112$ g mol⁻¹.

Topics:Gas laws

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JEE Main 2017 · 9 Apr · Shift 1, Chemistry question 34