MCQ
An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be
- ACalcium.
- BCarbon.
- CSilicon.
- DIron.
Explanation:
Calcium reacts with oxygen to form calcium oxide with a high melting point. This compound is also soluble in water.
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Column I | Column II | ||
A | Bleaching powder | 1 | Preparation of glass |
B | Baking soda | 2 | Production of H2 and Cl2 |
C | Washing soda | 3 | Decolourisation |
D | Sodium chloride | 4 | Antacid |