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  9. Q12

RRB Group D (Level-1 posts) 2022 · Question 12 of 598

In Newland’s law of octaves, the first element is ____ and the last known element is ____.

  1. Ahydrogen, lanthanum
  2. Bhydrogen, thoriumCorrect
  3. Chydrogen, zirconium
  4. Dhelium, zirconium

Answer: B. hydrogen, thorium

Explanation

According to Newland's law of octaves, the first element is hydrogen, and the last element known during his time was thorium.

Source: RRB Group D 2022 Prev. Yr. Paper (17 Aug 2022) (Shift 1) - FreshersNow · reliable-secondary

← Q11View full paper (598 questions)Q13 →

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