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Metals and Non-Metals — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMetals and Non-Metals1 Mark
MCQ
An element 'X' reacts with O2 to give a compound with a high melting point. This compound is also soluble in water. The element 'X' is likely to be:
  • A
    Iron.
  • B
    Calcium
  • C
    Carbon.
  • D
    Silicon.
✓

Answer

  1. Iron.

Explanation:

Calcium Oxide is formed when Calcium reacts with Oxygen.

But In certain cases, Silicon Dioxide may also be possible (Because its solubility depends on its crystalline structure).

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