Q10 / 160 · AP EAMCET 2020 (17 Sep Shift 2) · Chemistry

\(\mathrm{SF}_6\) is a kinetically inert substance because

  • A
    fluorine is highly electronegative
  • Correct answer
    B
    it is sterically protected
  • C
    greater difference in electronegativities of \(\mathrm{S}\) and \(\mathrm{F}\)
  • D
    larger size of S-atom

Solution

In \(\mathrm{SF}_6\), sulphur is \(s p^3 d^2\) hybridised. Both geometry and shape of the molecule is octahedral. \(\mathrm{SF}_6\) is also a non-polar molecule (dipole moment, \(\mu=0\) ), because if \(a^{-}\)and sterically protected perfectly symmetrical molecule. So, \(\mathrm{SF}_6\) is also kinetically inert.

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

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