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Question 46

The freezing point of a 4% aqueous solution of X is equal to the freezing point of a 12% aqueous solution of Y. If the molecular weight of X is A, then the molecular weight of Y will be

 The ratio of concentrations is equal to 1. Hence, for a given volume of solution the number of moles must be equal hence we can form a direct relationship for molecular weight by equating the number of moles. 

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