Which of the following is correct?

Which of the following is correct?
  1. The number of electrons present in the valence shell of $\mathrm{S}$ in $\mathrm{SF}_6$ is 12
  2. The rates of ionic reactions are very slow
  3. According to VSEPR theory, $\mathrm{SnCl}_2$ is a linear molecule
  4. The correct order of ability to form ionic compounds among $\mathrm{Na}^{+}, \mathrm{Mg}^{2+}$ and $\mathrm{Al}^{3+}$ is $\mathrm{Al}^{3+}>\mathrm{Mg}^{2+}>\mathrm{Na}^{+}$

Solution

$\mathrm{SF}_6$ does not obey octet rule as in it S-atom has 12 electrons in its valence shell.
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Asked in: JEE-TOPICTESTS-CHEMISTRY

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