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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
(a) calcium
Explanation: Calcium reacts with oxygen to give an ionic compound, calcium oxide, having a high melting point. This calcium oxide compound is soluble in water. Carbon reacts with oxygen to form carbon dioxide, which is a gas. Silicon reacts with oxygen to form a compound silicon dioxide which has high melting point but insoluble in water. Similarly iron with oxygen to form iron (III) oxide compound which has a high melting point but insoluble in water
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