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Byju's Answer
Standard XI
Chemistry
Chemical Properties of Boron Family
BX3 NH3 ⟶ BX3...
Question
B
X
3
N
H
3
⟶
B
X
3
.
N
H
3
Δ
H
f
= Heat of formation of the adduct. The numerical value of
Δ
H
f
is found to be maximum for:
A
B
F
3
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B
B
C
l
3
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C
B
B
r
3
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D
B
I
3
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Solution
The correct option is
D
B
I
3
B
I
3
is by far the strongest Lewis acid and thus the heat of adduct formation will be the highest in magnitude.
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Similar questions
Q.
B
X
3
N
H
3
⟶
B
X
3
.
N
H
3
Δ
H
f
= Heat of formation of the adduct. The numerical value of
Δ
H
f
is found to be maximum for:
Q.
B
X
3
+
N
H
3
→
B
X
3
.
N
H
3
+
Heat of adduct formation (
Δ
H
)
The numerical value of
Δ
H
is found to be maximum for:
Q.
For which of the following compound enthalpy of formation (
) value is more negative
Q.
N
2
(
g
)
+
3
H
2
(
g
)
⟶
2
N
H
3
:
Δ
H
=
−
92
k
J
is Haber`s process for manufacture of
N
H
3
.
What is the numerical value of heat of formation of
N
H
3
?
Q.
Since, the enthalpy of the elements in their standard states is taken to be zero, the heat of formation
(
Δ
H
f
)
of compounds:
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