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Standard XII
Chemistry
Chemical Properties of Aromatic Compounds
35. Pure N2 i...
Question
35. Pure N2 is not produced when:- 1)Red hot CuO and NH3 react 2)Ba(N3)2 is heated 3)NaN3 is heated 4) None of these
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Q.
When heated
N
H
3
is passed over
C
u
O
, evolved gas is :
Q.
Small quantities of very pure
N
2
is obtained by carefully warming
Q.
Complete and balance the equation: CuO (heated) + NH
3
→
Q.
6.80 g of
N
H
3
; is passed over heated CuO. The standard heat enthalpies of
N
H
3
,
C
u
O
(
s
)
and
H
2
O
(
l
)
are -46.0, -155.0 and
−
285
0
k
J
m
o
l
−
1
respectively and the change is.
N
H
3
+
(
3
/
2
)
C
u
O
⟶
1
2
N
2
(
g
)
+
(
3
/
2
)
H
2
O
(
l
)
+
(
3
/
2
)
C
u
(
s
)
.
If the enthalpy change is
Q.
6.80 g of
N
H
3
; is passed over heated CuO. The standard heat enthalpIes of
N
H
3
,
C
u
O
(
s
)
and
H
2
0
(
l
)
are -46.0, -155.0 and
−
285
0
k
J
m
o
l
−
1
respectively and the change is.
N
H
3
+
(
3
/
2
)
C
u
O
⟶
1
2
N
2
(
g
)
+
(
3
/
2
)
H
2
O
(
l
)
+
(
3
/
2
)
C
u
(
s
)
.
If the enthalpy change is
x
kJ then
−
x
15
(nearest integer) is___________.
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