1.

When W_(B)gm solute (molecular mass M_(B)) dissolves in W_(A)gm solvent. The molality M of the solution is

Answer»

`(W_(B))/(W_(A))XX(M_(B))/(1000)`
`(W_(B))/(M_(B))xx(1000)/(W_(A))`
`(W_(A))/(W_(B))xx(1000)/(M_(B))`
`(W_(A)xxM_(B))/(W_(B)xx1000)`

ANSWER :B


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