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Chemistry
Which of these doesn’t exist?
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Q. Which of these doesn’t exist?
BITSAT
BITSAT 2017
A
$PH _{3}$
0%
B
$PH _{5}$
50%
C
$LuH _{3}$
0%
D
$PF _{6}$
50%
Solution:
$PH _{5}$ does not exist because d-orbital of ' $P$ ' interacts with s-orbital of $H$.
Bond formed is not stable and not energetically favorable.
It depends on size and orientation of interaction.