Q.

The volume of concentrated sulphuric acid ( 98 mass %H2SO4,density 1.84 g cm3 required to prepare 5dm3of 0.5mol dm5solution  of sulphuric acid is 

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a

204 cm3

b

68 cm3

c

136 cm3

d

272 cm3

answer is B.

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Detailed Solution

V=m(100/98)ρ=n2M2(100/98)ρ=(MV)M2(100/98)ρ

=0.5moldm35dm398gmol1(100/98)/1.84gcm3=136cm3

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The volume of concentrated sulphuric acid ( 98 mass %H2SO4,density 1.84 g cm−3 required to prepare 5dm3of 0.5mol dm−5solution  of sulphuric acid is