Question

Chemistry Sec-1
Ques. 20 (MMCQ)
Which of the following molecule(s) has/have zero dipole moment?
A
BeF2
B
BF3
C
CF4
D
XeF4

Answer 1

Answer:

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Explanation:

Chemistry Sec-1

Ques. 20 (MMCQ)

Which of the following molecule(s) has/have zero dipole moment?

A

BeF2

B

BF3

C

CF4

D

XeF4

ANSWER

The order of dipole moment is as follows:

1,2--dichlorobenzene > 1,3-dichlorobenzene > 1,4-dichlorobenzene

Since two Cl groups in ortho make an acute angle, according to the equation-

Dipole moment D=

(d

1

2

+d

2

2

+2d

1

d

2

×cosx)

[where x is the angle between the groups]

Thus, 1,3-dichlorobenzene has lesser moment than 1,2--dichlorobenzene and 1,4-dichlorobenzene has 0 dipole moment as cos 90

o

=0.

Hence, option A is correct.

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Answer 2

all of these are dipole moment is zero

so please check your question