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Physical and Chemical Changes — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7SciencePhysical and Chemical Changes1 Mark
MCQ
When magnesium ribbon burnt it produce:
  • A
    Magnesium hydroxide
  • ✓
    Magnesium oxide
  • C
    Magnesium chloride
  • D
    Magnesium sulphate
✓

Answer

Correct option: B.
Magnesium oxide
When magnesium ribbon burns, it reacts with the oxygen present in the air and form a powdery ash called magnesium oxide.
$\ce{2Mg + O_2​\rightarrow 2MgO}.$

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