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Byju's Answer
Standard XII
Chemistry
Boiling Point of Alkanes
Which is stro...
Question
Which is stronger Lewis acid,BCl3 or BF3 ? explain
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Solution
Dear Student
A
m
o
n
g
B
F
3
a
n
d
B
C
l
3
B
C
l
3
i
s
a
s
t
r
o
n
g
e
r
l
e
w
i
s
a
c
i
d
.
I
t
i
s
b
e
a
c
u
s
e
i
n
B
F
3
F
d
o
n
a
t
e
s
l
o
n
e
p
a
i
r
o
f
e
l
e
c
t
r
o
n
s
m
o
r
e
e
a
s
i
l
y
a
n
d
s
t
r
o
n
g
l
y
w
h
e
n
c
o
m
p
a
r
e
d
t
o
t
h
C
l
i
n
B
C
l
3
.
T
h
u
s
e
l
e
c
t
r
o
n
d
e
f
i
c
i
e
n
c
y
i
s
m
o
r
e
i
n
B
C
l
3
t
h
a
n
B
F
3
.
H
e
n
c
e
B
C
l
3
i
s
a
s
t
r
o
n
g
e
r
L
e
w
i
s
a
c
i
d
.
Regards
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Similar questions
Q.
The correct order of Lewis acidity of
B
X
3
molecule is
Q.
The Lewis acid strength of
B
B
r
3
,
B
C
l
3
a
n
d
B
F
3
is in the order
Q.
The correct order of lewis acid strength of
B
(
O
H
)
3
,
B
(
N
H
2
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3
,
B
F
3
and
B
C
l
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is:
Q.
The Lewis acid strength of
B
B
r
3
,
B
C
l
3
and
B
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3
is in the order.
Q.
Assertion :
B
F
3
is a weaker Lewis acid than
B
C
l
3
. Reason: The planar
B
F
3
molecule is stabilised to a greater extent than
B
C
l
3
by
B
−
X
π
-bonding.
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