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When a certain amount of a univalent salt AB (molar mass =54 ~g ~mol ⁻¹ ) was dissolved in 0.1 dm ^3 of water, the relative lowering of the vapour pressure was found to be 3.55 % . The molality of the resulting solution is: (Assume complete dissociation of the salt under given condition. Density of water =1 ~g ~cm ⁻³ )
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- A0.5 m
- B1.0 m
- C2.0 m
- D4.0 m
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