Chemistry Exam > Chemistry Questions > Which of the following statemets is true?a)Th...
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Which of the following statemets is true?
- a)The dipole moment of NF3 is zero
- b)The dipole moment of NF3 is less than NH3
- c)The dipole moment of NF3 is more than NH3
- d)The dipole moment of NH3 is zero
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Which of the following statemets is true?a)The dipole moment of NF3 is...
**Explanation:**
The dipole moment is a measure of the polarity of a molecule. It is defined as the product of the magnitude of the charge on either end of the bond and the distance between the charges.
To determine the dipole moment of a molecule, we need to consider the polarity of the individual bonds and the molecular geometry.
**Dipole Moment of NF3:**
The Lewis structure of NF3 shows that nitrogen (N) has a lone pair of electrons and three fluorine (F) atoms are bonded to it. The N-F bonds are polar due to the difference in electronegativity between N and F.
The molecular geometry of NF3 is trigonal pyramidal, with the lone pair of electrons on nitrogen causing a distortion in the shape. This geometry results in a net dipole moment pointing towards the lone pair of electrons.
Therefore, the dipole moment of NF3 is not zero.
**Dipole Moment of NH3:**
The Lewis structure of NH3 also shows that nitrogen (N) has a lone pair of electrons and three hydrogen (H) atoms are bonded to it. The N-H bonds are also polar due to the difference in electronegativity between N and H.
The molecular geometry of NH3 is also trigonal pyramidal, similar to NF3. The presence of the lone pair of electrons on nitrogen causes a distortion in the shape and results in a net dipole moment pointing towards the lone pair of electrons.
Therefore, the dipole moment of NH3 is also not zero.
**Comparison between NF3 and NH3:**
- Both NF3 and NH3 have a net dipole moment due to the polar N-F and N-H bonds.
- However, the electronegativity of fluorine (F) is higher than that of hydrogen (H). This means that the N-F bond is more polar than the N-H bond.
- As a result, the dipole moment of NF3 is greater than the dipole moment of NH3.
Therefore, the correct statement is option **c) The dipole moment of NF3 is more than NH3**.
The dipole moment is a measure of the polarity of a molecule. It is defined as the product of the magnitude of the charge on either end of the bond and the distance between the charges.
To determine the dipole moment of a molecule, we need to consider the polarity of the individual bonds and the molecular geometry.
**Dipole Moment of NF3:**
The Lewis structure of NF3 shows that nitrogen (N) has a lone pair of electrons and three fluorine (F) atoms are bonded to it. The N-F bonds are polar due to the difference in electronegativity between N and F.
The molecular geometry of NF3 is trigonal pyramidal, with the lone pair of electrons on nitrogen causing a distortion in the shape. This geometry results in a net dipole moment pointing towards the lone pair of electrons.
Therefore, the dipole moment of NF3 is not zero.
**Dipole Moment of NH3:**
The Lewis structure of NH3 also shows that nitrogen (N) has a lone pair of electrons and three hydrogen (H) atoms are bonded to it. The N-H bonds are also polar due to the difference in electronegativity between N and H.
The molecular geometry of NH3 is also trigonal pyramidal, similar to NF3. The presence of the lone pair of electrons on nitrogen causes a distortion in the shape and results in a net dipole moment pointing towards the lone pair of electrons.
Therefore, the dipole moment of NH3 is also not zero.
**Comparison between NF3 and NH3:**
- Both NF3 and NH3 have a net dipole moment due to the polar N-F and N-H bonds.
- However, the electronegativity of fluorine (F) is higher than that of hydrogen (H). This means that the N-F bond is more polar than the N-H bond.
- As a result, the dipole moment of NF3 is greater than the dipole moment of NH3.
Therefore, the correct statement is option **c) The dipole moment of NF3 is more than NH3**.
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Community Answer
Which of the following statemets is true?a)The dipole moment of NF3 is...
Structure of NH3 and NF3 both shows a lone pair on a head.Incase of NF3 Flurine is highly electronegative than Nitrogen hence N-F bonded electron pull towards F and resultant works towards below as lone pair posses it will work on upper side so the resultant dipole moment become less than NH3 cause in this case Nitrogen is highly electronegative so N-H bonded electron pulled toward N and lone pair will work also upper direction so dipole moment of NH3 becomes higher than NF3 so the option B is correct.
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Which of the following statemets is true?a)The dipole moment of NF3 is zerob)The dipole moment of NF3 is less than NH3c)The dipole moment of NF3 is more than NH3d)The dipole moment of NH3 is zeroCorrect answer is option 'B'. Can you explain this answer?
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