An element X (atomic number 12) reacts with another element \( \mathrm{Y} \) (atomic number 17) ...

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An element X (atomic number 12) reacts with another element \( \mathrm{Y} \) (atomic number 17) to form a compound \( \mathrm{Z} \).
Which of the following statements are true regarding this compound?
(i) Molecular formula of \( \mathrm{Z} \) is \( \mathrm{XY}_{2} \).
(ii) It is soluble in water.
(iii) \( \mathrm{X} \) and \( \mathrm{Y} \) are joined by sharing of electrons.
(iv) It would conduct electricity in the molten state.
a. (ii) and (iii)
b. (i) and (iii)
c. (i), (ii) and (iv)
d. (i) and (iv)
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