The ionic bonds \( \mathrm{X}^{+} \mathrm{Y}^{-} \)are formed when : (I) electron affinity of \(...

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The ionic bonds \( \mathrm{X}^{+} \mathrm{Y}^{-} \)are formed when :
(I) electron affinity of \( Y \) is high
(II) ionization energy of \( \mathrm{X} \) is low
(III) lattice energy of \( \mathrm{XY} \) is high
(IV) lattice energy of \( \mathrm{XY} \) is low Choose the correct code :
(a) I and II
(b) I and III
(c) I, II and III
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