Multiple choice

Hard glass is prepared by

  1. fusing a mixture of sodium carbonate, calcium carbonate and silica

  2. fusing a mixture of potassium carbonate, calcium carbonate and silica

  3. fusing a mixture of potassium carbonate and any oxide

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hard glass is prepared by fusing a mixture of potassium carbonate, calcium carbonate and silica.

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