Question

(i) Which one of the following do not form a Dobereiner's Triads. তলৰ কোনটো ড’বাৰেইনাৰৰ ট্রায়াড গঠন নকৰে। (a) N, P, As (6) Li, Na, K (c) Ca, Sr, Ba (d) Cl, Br, I CXT:nihimon heineantinfofilata​

Answer 1

Answer:

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Explanation:

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Answer 2

Of the following (a) N, P, As do not form a Dobereiner's Triads.

• Dobereiner's Triads was the first-ever periodic classification. According to Dobereiner classification in any triad, the middle elements' weight is always equal to the mean of the other two elements' atomic weight.
• The property of the middle element always resembled the other two.
• However, this form of classification was not accepted after some time as it was restricted to a few elements only.
• Of the following option, triads are Li, Na, K; Ca, Sr, Ba; Cl, Br, I.
• So, (a) N, P, As will be the answer.