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14 gm of an element X combines with 16 gm of oxygen. On basis of this which of the following is correct ? (At.wt of oxygen = 16)

1) The element X could have an atomic weight of 7 and it's oxide formula is XO.

2) The element X could have an atomic weight 14 and it's oxide formula X2O3.

3) The element X could have an atomic weight 7 and it's oxide formula X2O.

4) The element X could have an atomic weight 14 and it's oxide formula XO2.

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Ans : (3) The element X could have an atomic weight 7 and its oxide formula is X2O.

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