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  9. Q421

RRB Group D (Level-1 posts) 2022 · Question 421 of 598

A magnesium ribbon burns with a dazzling flame in air (oxygen) and changes into a white substance 'X'. The X is:

  1. AMgCO3
  2. BMg
  3. CMg(OH)2
  4. DMgOCorrect

Answer: D. MgO

Explanation

When magnesium burns in oxygen, it forms magnesium oxide (MgO), a white powdery substance.

Source: RRB Group D 2022 Prev. Yr. Paper (18 Aug 2022) (Shift 3) - Prepp · reliable-secondary

← Q420View full paper (598 questions)Q422 →

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