1.

The three imaginary elements X, Y and Z represent a Dobereiner's triad. If the atomic mass of element X is 14 u and that of element Y is 46 u, then the atomic mass of element Z will be .........

Answer»

28
60
78
72

Solution :According to the law of Dobereiner.s triad,
Atomic mass of Y `=("Atomic mass of X + Atomic mass of Z")/(2)`
`46=("14 + Atomic mass of Z")/(2)`
92 = 14 + Atomic mass of Z
`:.` Atomic mass of Z = 92 - 14 = 78 U]


Discussion

No Comment Found

Related InterviewSolutions