Font size
Worksheetsgroup 15-elements
Total questions: 25
Worksheet time: 13mins
nitrogen always acquires -3 oxidation state by sharing of electrons while other elements do so by gaining of electrons.
true
false
down the group + 5 is highly stable due to inert pair effect
true
false
For phoshorus all oxidation states from -3 to +5 undergo disproportionation
in acidic medium only
in basic medium only
in both -acidic and basic medium
The maximum covalency of nitrogen is
3
4
5
Ammonia reacts with Nessler 's reagent to give
Deep blue precipitate
White precipitate
Green precipitate
Brown precipitate
The largest bond angle is in
AsH3
NH3
H2O
PH3
Conditions required to prepare ammonia in industry are
200atm
450 oC
iron
nitrogen
Nitrogen monoxide is
Colourless
odourless
acidic
neutral
Oxidation state of ”P” in H3PO4 is
a. +2
b.+5
c.+6
d.+7
P-block elements are those elements in which last electron enters in
P ortibal
S orbital
d orbital
None of the above
Nitrogen is chemically inert. Why?
Due to presence of double bond require more energy to break
Due to presence of triple bond require more energy to break
Triple bond requires less energy to break
None of the above
Among the hydrides of 15th group , which is strong reducing agent?
Ammonia
Phosphine
Arsine
Bismuthine
Ammonia is a Lewis base and act as complexing agent.
It accepts electron pair
It is neither electron pair donar or acceptor
It act as electron pair donar.
It exhibit covalency more than five
Which of the following pair behaves as strongest and weakest base hydride respectively NH3, PH3, AsH3;,
SbH3, BiH3 ?
(a) NH3, PH3;
(b) NH3, BiH3
(c) PH3, BiH3
(d) BiH3, AsH3
Indian salt petre is :
sodium nitrite
potassium nitrite
potassium nitrate
nitrogen is diatomic
due to small size
due to weak N-N bond
due to absence of d- orbitals
Bismuth is a
Metalloids
Non metal
Metal
None of the above
Nitrogen and phosphorus are
Non metals
Metals
Metalloids
None of the above
In group 15 elements as we move down the group
Non metallic character increase
Metallic character increase
Both
None the above
Bismuth forms stable compound in +3 state than in +5 state . Why?
Inert pair effect
Ortho effect
Nitrogen cannot exhibit co valancy more than four due to
Presence of vacant d orbitals
Due to large size
Due to absence of vacant d orbitals
Due to inert nature
General Electronic Configuration of Nitrogen family :
ns2 np1
ns2 np2
ns2 np3
ns1 np3
what happens to atomic radius when we move down the group from top to bottom?
increases
decreases
remains same
none of above
Which element has possess high electron negativity?
Bi
As
N
P
what happens to atomic radius when we move down the group from top to bottom?
increases
decreases
remains same
none of above
