Question
Science Question on Chemical Properties Of Metals
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
Answer
calcium
Explanation
Solution
Calcium reacts with oxygen to form calcium oxide (CaO), which has a high melting point. Additionally, calcium oxide is soluble in water, forming a basic solution (calcium hydroxide, Ca(OH)₂).
Therefore, the correct answer is (A): calcium.