An element reacts with oxygen to give a compound with a high melting point. Thiscompound is also soluble in water. The element is likely to be(a) calcium (b) carbon(c) silicon (d) iron
Question
An element reacts with oxygen to give a compound with a high melting point. Thiscompound is also soluble in water. The element is likely to be(a) calcium (b) carbon(c) silicon (d) iron
Solution
The element is likely to be calcium. Here's why:
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Calcium, when it reacts with oxygen, forms calcium oxide. This compound has a high melting point of 2572°C.
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Calcium oxide is also soluble in water. It reacts with water to form calcium hydroxide, which is a soluble compound.
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The other options, carbon, silicon, and iron, do not
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