Question

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

(a) Li, Na, K (b) Be, Mg, Ca

(c) Ca, Sr, Ba (d) Cu, Ag, Au​

Answer 1

Explanation:

Answer: cu ag au is the answer as dobereniers law does not hold true for these elements.

Answer 2

Answer:

{ D } Cu, Ag, Au

Explanation:

Since the atomic weight of Ag is not equal to the mean of the atomic weights of Cu and Au.

Thus, (Cu, Ag, Au) triad do not follow Dobereiner's law of triads.

Option D is correct.

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