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To expel half the mass of air from a large flask at $27^{\large\circ}C$ , it must be heated to


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PV = nRT
at constant P and V
$n_1T_1 = n_2T_2$
$n_1\times100 = \large\frac{n_1}{2}\times T$
T = 600K
Hence answer is (d)
answered Mar 1, 2014 by sharmaaparna1

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