The P Block Elements Ques 25
Of the following hybrids which one has the lowest boiling point?
[1989]
(a) $AsH_3$
(b) $SbH_3$
(c) $PH_3$
(d) $NH_3$
Show Answer
Solution:
- (c) $NH_3$ undergoes H-bonding and hence has the highest b.p. Among the remaining hydrides i.e. $PH_3, AsH_3$ and $SbH_3$ the b.p. increases with the size of the element and hence the magnitude of the van der Waal’s forces of attraction increases. Thus, $SbH_3$ has the lowest b.p.
BETA
