An element produces X, Y & Z compounds. Equivalent masses of that element in the compound X, Y & Z are in the ratio of 1:2:3. in which of the three compounds, element exhibits its maximum valency?

Explanation

We know, equivalent mass `prop(1)/("valency")`
Hence, the compound in which the equivalent mass of that element is minimum, exhibits the maximum valency of the element. Since the equivalent mass of that element is minimum in compound X, the valency of the element in X is maximum.