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
It is given that the element reacts with oxygen to give a high melting point .
- Hence, the element must be very reactive and must form an ionic bond .
- Ionic bonds are are formed between electropositive metals and electronegative non-metals
- Carbon and Silicon are neither electropositive nor electronegative. They form covalent bonds .
- So, the element can either be Calcium or Fe
It's also given that the compound is soluble in water.
- The metal must be an alkali metal.
- From the given options, only Calcium is an alkali metal.
Therefore, the element is most likely to be Calcium (Ca) .
So, the correct answer is (a)