Chemistry S & P Block Elements BUMHS 2022
PMDC Verified Question 59 of 104
The color of the Mg metal flame is?
A
Blue
B
Violet
C
Yellow
D
White
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option D: White
Concept:

When metals are heated in a flame or combusted, the excitation and subsequent relaxation of their electrons emit light of a characteristic wavelength (color).

Solution:

  • Magnesium (Mg) is highly reactive and burns fiercely in the presence of oxygen.
  • When it combusts, it emits an intense, blinding, brilliant white flame.
  • This characteristic bright white light is due to its specific emission spectrum, which covers a broad range of the visible spectrum. (This is why Magnesium is often used in flares and fireworks).


Why other options are incorrect:

  • Blue: Usually associated with copper halides or certain lead compounds.
  • Violet: Characteristic of Potassium (K).
  • Yellow: Characteristic of Sodium (Na).

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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