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Q.

0.5  dm3 flask contains gas A and 1  dm3 flask contains gas B at the same temperature. If density of A = 3 g/dm3 and that of B = 1.5 g/dm3 and the molar mass of A = 1/2 of B, the ratio of pressure exerted by gases is

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a

PAPB=2

b

PAPB=1

c

PAPB=4

d

PAPB=3

answer is C.

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Detailed Solution

VA=0.5  dm3,              VB=1  dm3dA=3  g/dm3,              dB=1.5  dm3MA=12  MB ;                 PA=dARTMA ;   PB=dBRTMBPAPB=dAdb×  MBMA    31.5×2=4

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A 0.5  dm3 flask contains gas A and 1  dm3 flask contains gas B at the same temperature. If density of A = 3 g/dm3 and that of B = 1.5 g/dm3 and the molar mass of A = 1/2 of B, the ratio of pressure exerted by gases is