The ionic bonds $X^{+}Y^{-}$ are formed when
$I$. electron affinity of $Y$ is high
$II$. ionization energy of $X$ is low
$III$. lattice energy of $XY$ is high
$IV$. lattice energy of $XY$ is low
Choose the correct code.

  • A
    $I$ and $II$
  • B
    $I$ and $III$
  • C
    $I, II$ and $III$
  • D
    All

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