1.

An element reacts with oxygen to give a compound with a high melting point. This compoundis also soluble in water. The element is likely to be

Answer»

Calcium
Carbon
SILICON
Iron

Solution : Calcium reacts with oxygen to GIVE CaO which dissolves in water to give lime water.
`CA+ 1/2 O_2 to CaO`
`CaO + H_2O to Ca(OH)_2`


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