1.

Which of the following triads does not follow Dobereiner's law of triads?

Answer»

(a) Li, Na, K
(b) Ca, SR, Ba
(c) Be, Mg, Ca
(d) Cu, Ag, Au

Solution :since the atomic WEIGHT of Ag is not equal to the MEAN
of the atomic weights of Cu and Au, (Cu, Ag and Au)
triad do not follow DOBEREINER's LAW of triads.


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