and 
Answer:
Trends in chemical properties of
group - 15
(i) All the
elements of group - 15 combine with hydrogen give 
sic nature
decreases
Bond length increases
Reducing power
increases.
(ii) Action of
halogen : Nitrogen forms only trihalide 
table
other elements form trihalides and
pentahalides.
is unstable except BiF^ due to inert
pair effect.
(iii) Action of
metal: All the elements except Bi combine With metals e.g. 
(iv) Action of
oxygen : Nitrogen forms a number of oxides 
etc.
Phosphorus forms two type tides 
and 
while rest of the elements form types
of oxide 
&
.
(b) Nitrogen
has small size, high ionisation enthalpy am absence of d-orbital. Therefore it
shows anomalous behaviour.
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