13. 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) Ca
(b) C
(c) Si
(d) Fe
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ANSWER :
(a) Ca
Explanation:
The element is likely to be. Calcium reacts with oxygen and forms calcium oxide which has a high melting point and is soluble in water too.
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