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An element reacts with oxygen to give a ...

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 -

A

calcium

B

carbon

C

silicon

D

iron

Text Solution

Verified by Experts

The correct Answer is:
A
When carboon reacts with oxyhgen it forms carbon dioxide. This carbon dioxide is a gas. Gases do not possess melting point. Silicon react with oxygen and forms silicon dioxide. This is insoluble in water. Iron reacts with oxygen and forms Iron dioxide. This is insoluble in water. Calcium reacts with oxyhgen and forms calcium oxide. This calcium oxide dissolves in water and forms calcium hydroxide dissolves in water and forms calcium hydroxide. The melting point of calcium oxide is nearly `2,500^(@)C`.
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