The formula of sulphate of element X is X |
|||||||

(a) |
X |
(b) |
XN |
(c) |
XN |
(d) |
X |

The formula of sulphate of element X is X |
|||||||

(a) |
X |
(b) |
XN |
(c) |
XN |
(d) |
X |

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