Q18 / 160 · AP EAMCET 2014 · Chemistry

The number of electrons is the valence shell of the central atom of a molecules is 8 . The molecule is

  • A
    $\mathrm{BCl}_3$
  • B
    $\mathrm{BeH}_2$
  • Correct answer
    C
    $\mathrm{SCl}_2$
  • D
    $\mathrm{SF}_6$

Solution

In $\mathrm{SCl}_2$, number of lone pairs on $\mathrm{S}=\frac{6-2(1)}{2}=2$ $\therefore$ Total number of pairs of electrons $=2$ bonding +2 lone pairs $=4$ pairs $\therefore$ Total number of electrons in valency shell $=4 \times 2=8$

Hence, the correct answer is option: 'C'.

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