Polarity of a Covalent Bond
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CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313842 Assertion :
\(\mathrm{H}_{2} \mathrm{~S}\) has greater dipole moment than \(\mathrm{BF}_{3}\).
Reason :
Fluorine is more electronegative than sulphur.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313843 The dipole moment of HBr is \({\rm{2}}{\rm{.6 \times 1}}{{\rm{0}}^{{\rm{ - 30}}}}\,\,{\rm{C - m}}\) and the interatomic spacing is \({\rm{1}}{\rm{.41}}\,\,\mathop {\rm{A}}\limits^{\rm{^\circ }} \). The percentage of ionic character in HBr is

1 10.5
2 11.5
3 12.5
4 13.5
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313844 The variation of dipole moment \(\left( {\rm{\mu }} \right)\) and angle \(\left( {\rm{\theta }} \right)\) change with a change in hybridisation from
\({\rm{s}}{{\rm{p}}^{\rm{3}}} \to {\rm{s}}{{\rm{p}}^{\rm{2}}} \to {\rm{sp}}\) is

1 \({\rm{\mu }}\,\,{\rm{increase,}}\,\,{\rm{\theta }}\,\,{\rm{decrease}}\)
2 \({\rm{\mu }}\,\,{\rm{decrease,}}\,\,{\rm{\theta }}\,\,{\rm{increase}}\)
3 \({\rm{\mu }}\,\,{\rm{and}}\,\,{\rm{\theta }}\,\,{\rm{both}}\,\,{\rm{decrease}}\)
4 \({\rm{\mu }}\,\,{\rm{and}}\,\,{\rm{\theta }}\,\,{\rm{both}}\,\,{\rm{increase}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313845 Bond angle in \({{\rm{H}}_{\rm{2}}}{\rm{S}}\,\,{\rm{is}}\,\,{\rm{97^\circ }}{\rm{.}}\) The S - H bond moment is 0.72 D dipole moment of \({{\rm{H}}_{\rm{2}}}{\rm{S}}\) molecule is \(\left( {{\rm{Cos}}\,\,{\rm{48}}{\rm{.5^\circ = 0}}{\rm{.662}}} \right)\)

1 0.95 D
2 0.72 D
3 0.66 D
4 0.36 D
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CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313842 Assertion :
\(\mathrm{H}_{2} \mathrm{~S}\) has greater dipole moment than \(\mathrm{BF}_{3}\).
Reason :
Fluorine is more electronegative than sulphur.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313843 The dipole moment of HBr is \({\rm{2}}{\rm{.6 \times 1}}{{\rm{0}}^{{\rm{ - 30}}}}\,\,{\rm{C - m}}\) and the interatomic spacing is \({\rm{1}}{\rm{.41}}\,\,\mathop {\rm{A}}\limits^{\rm{^\circ }} \). The percentage of ionic character in HBr is

1 10.5
2 11.5
3 12.5
4 13.5
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313844 The variation of dipole moment \(\left( {\rm{\mu }} \right)\) and angle \(\left( {\rm{\theta }} \right)\) change with a change in hybridisation from
\({\rm{s}}{{\rm{p}}^{\rm{3}}} \to {\rm{s}}{{\rm{p}}^{\rm{2}}} \to {\rm{sp}}\) is

1 \({\rm{\mu }}\,\,{\rm{increase,}}\,\,{\rm{\theta }}\,\,{\rm{decrease}}\)
2 \({\rm{\mu }}\,\,{\rm{decrease,}}\,\,{\rm{\theta }}\,\,{\rm{increase}}\)
3 \({\rm{\mu }}\,\,{\rm{and}}\,\,{\rm{\theta }}\,\,{\rm{both}}\,\,{\rm{decrease}}\)
4 \({\rm{\mu }}\,\,{\rm{and}}\,\,{\rm{\theta }}\,\,{\rm{both}}\,\,{\rm{increase}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313845 Bond angle in \({{\rm{H}}_{\rm{2}}}{\rm{S}}\,\,{\rm{is}}\,\,{\rm{97^\circ }}{\rm{.}}\) The S - H bond moment is 0.72 D dipole moment of \({{\rm{H}}_{\rm{2}}}{\rm{S}}\) molecule is \(\left( {{\rm{Cos}}\,\,{\rm{48}}{\rm{.5^\circ = 0}}{\rm{.662}}} \right)\)

1 0.95 D
2 0.72 D
3 0.66 D
4 0.36 D
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CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313842 Assertion :
\(\mathrm{H}_{2} \mathrm{~S}\) has greater dipole moment than \(\mathrm{BF}_{3}\).
Reason :
Fluorine is more electronegative than sulphur.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313843 The dipole moment of HBr is \({\rm{2}}{\rm{.6 \times 1}}{{\rm{0}}^{{\rm{ - 30}}}}\,\,{\rm{C - m}}\) and the interatomic spacing is \({\rm{1}}{\rm{.41}}\,\,\mathop {\rm{A}}\limits^{\rm{^\circ }} \). The percentage of ionic character in HBr is

1 10.5
2 11.5
3 12.5
4 13.5
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313844 The variation of dipole moment \(\left( {\rm{\mu }} \right)\) and angle \(\left( {\rm{\theta }} \right)\) change with a change in hybridisation from
\({\rm{s}}{{\rm{p}}^{\rm{3}}} \to {\rm{s}}{{\rm{p}}^{\rm{2}}} \to {\rm{sp}}\) is

1 \({\rm{\mu }}\,\,{\rm{increase,}}\,\,{\rm{\theta }}\,\,{\rm{decrease}}\)
2 \({\rm{\mu }}\,\,{\rm{decrease,}}\,\,{\rm{\theta }}\,\,{\rm{increase}}\)
3 \({\rm{\mu }}\,\,{\rm{and}}\,\,{\rm{\theta }}\,\,{\rm{both}}\,\,{\rm{decrease}}\)
4 \({\rm{\mu }}\,\,{\rm{and}}\,\,{\rm{\theta }}\,\,{\rm{both}}\,\,{\rm{increase}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313845 Bond angle in \({{\rm{H}}_{\rm{2}}}{\rm{S}}\,\,{\rm{is}}\,\,{\rm{97^\circ }}{\rm{.}}\) The S - H bond moment is 0.72 D dipole moment of \({{\rm{H}}_{\rm{2}}}{\rm{S}}\) molecule is \(\left( {{\rm{Cos}}\,\,{\rm{48}}{\rm{.5^\circ = 0}}{\rm{.662}}} \right)\)

1 0.95 D
2 0.72 D
3 0.66 D
4 0.36 D
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CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313842 Assertion :
\(\mathrm{H}_{2} \mathrm{~S}\) has greater dipole moment than \(\mathrm{BF}_{3}\).
Reason :
Fluorine is more electronegative than sulphur.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313843 The dipole moment of HBr is \({\rm{2}}{\rm{.6 \times 1}}{{\rm{0}}^{{\rm{ - 30}}}}\,\,{\rm{C - m}}\) and the interatomic spacing is \({\rm{1}}{\rm{.41}}\,\,\mathop {\rm{A}}\limits^{\rm{^\circ }} \). The percentage of ionic character in HBr is

1 10.5
2 11.5
3 12.5
4 13.5
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313844 The variation of dipole moment \(\left( {\rm{\mu }} \right)\) and angle \(\left( {\rm{\theta }} \right)\) change with a change in hybridisation from
\({\rm{s}}{{\rm{p}}^{\rm{3}}} \to {\rm{s}}{{\rm{p}}^{\rm{2}}} \to {\rm{sp}}\) is

1 \({\rm{\mu }}\,\,{\rm{increase,}}\,\,{\rm{\theta }}\,\,{\rm{decrease}}\)
2 \({\rm{\mu }}\,\,{\rm{decrease,}}\,\,{\rm{\theta }}\,\,{\rm{increase}}\)
3 \({\rm{\mu }}\,\,{\rm{and}}\,\,{\rm{\theta }}\,\,{\rm{both}}\,\,{\rm{decrease}}\)
4 \({\rm{\mu }}\,\,{\rm{and}}\,\,{\rm{\theta }}\,\,{\rm{both}}\,\,{\rm{increase}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313845 Bond angle in \({{\rm{H}}_{\rm{2}}}{\rm{S}}\,\,{\rm{is}}\,\,{\rm{97^\circ }}{\rm{.}}\) The S - H bond moment is 0.72 D dipole moment of \({{\rm{H}}_{\rm{2}}}{\rm{S}}\) molecule is \(\left( {{\rm{Cos}}\,\,{\rm{48}}{\rm{.5^\circ = 0}}{\rm{.662}}} \right)\)

1 0.95 D
2 0.72 D
3 0.66 D
4 0.36 D
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