Comparision of Valence Bond Theory and Molecular Orbital Theory
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313785 Read the Statement \({\mathrm{A}}\) and Statement B carefully to mark the correct options given below:
Statement A :
A \({\mathrm{\pi}}\) bonding MO has lower electron density above and below the internuclear axis.
Statement B :
The \({{\rm{\pi }}^{\rm{*}}}\) anti-bonding MO has a node between the nuclei.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313786 When \({\mathrm{\Psi_{\mathrm{A}}}}\) and \({\mathrm{\Psi_{\mathrm{B}}}}\) are the wave functions of atomic orbitals, then \({\mathrm{\sigma^{*}}}\) is represented by

1 \({\mathrm{\Psi_{A}-\Psi_{B}}}\)
2 \({\mathrm{\Psi_{A}+\Psi_{B}}}\)
3 \({\mathrm{\Psi_{A}+2 \Psi_{B}}}\)
4 \({\mathrm{\Psi_{A}-2 \Psi_{B}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313787 Assertion :
In the bonding molecular orbital (MO) of \(\mathrm{H}_{2}\), electron density is increased between the nuclei.
Reason :
The bonding MO is \(\Psi_{\mathrm{A}}+\Psi_{\mathrm{B}}\), shows destructive interference of the combining electron waves.

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

313788 A bonding molecular orbital is produced by

1 Destructive interference of wave functions
2 Constructive interference of wave functions
3 Pairing of electrons with opposite spins
4 Combination of +ve and –ve wave functions
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313789 If z-axis be the internuclear axis, which of the following combination of orbitals would not form \(\pi\)-bond?

1 \(\mathrm{p}_{\mathrm{x}}+\mathrm{p}_{\mathrm{x}}\)
2 \(\mathrm{d}_{\mathrm{xy}}+\mathrm{d}_{\mathrm{xy}}\)
3 \(\mathrm{d}_{\mathrm{zx}}+\mathrm{d}_{\mathrm{zx}}\)
4 \({{\rm{d}}_{{\rm{yz}}}} + {{\rm{d}}_{{\rm{yz}}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313785 Read the Statement \({\mathrm{A}}\) and Statement B carefully to mark the correct options given below:
Statement A :
A \({\mathrm{\pi}}\) bonding MO has lower electron density above and below the internuclear axis.
Statement B :
The \({{\rm{\pi }}^{\rm{*}}}\) anti-bonding MO has a node between the nuclei.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313786 When \({\mathrm{\Psi_{\mathrm{A}}}}\) and \({\mathrm{\Psi_{\mathrm{B}}}}\) are the wave functions of atomic orbitals, then \({\mathrm{\sigma^{*}}}\) is represented by

1 \({\mathrm{\Psi_{A}-\Psi_{B}}}\)
2 \({\mathrm{\Psi_{A}+\Psi_{B}}}\)
3 \({\mathrm{\Psi_{A}+2 \Psi_{B}}}\)
4 \({\mathrm{\Psi_{A}-2 \Psi_{B}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313787 Assertion :
In the bonding molecular orbital (MO) of \(\mathrm{H}_{2}\), electron density is increased between the nuclei.
Reason :
The bonding MO is \(\Psi_{\mathrm{A}}+\Psi_{\mathrm{B}}\), shows destructive interference of the combining electron waves.

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

313788 A bonding molecular orbital is produced by

1 Destructive interference of wave functions
2 Constructive interference of wave functions
3 Pairing of electrons with opposite spins
4 Combination of +ve and –ve wave functions
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313789 If z-axis be the internuclear axis, which of the following combination of orbitals would not form \(\pi\)-bond?

1 \(\mathrm{p}_{\mathrm{x}}+\mathrm{p}_{\mathrm{x}}\)
2 \(\mathrm{d}_{\mathrm{xy}}+\mathrm{d}_{\mathrm{xy}}\)
3 \(\mathrm{d}_{\mathrm{zx}}+\mathrm{d}_{\mathrm{zx}}\)
4 \({{\rm{d}}_{{\rm{yz}}}} + {{\rm{d}}_{{\rm{yz}}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313785 Read the Statement \({\mathrm{A}}\) and Statement B carefully to mark the correct options given below:
Statement A :
A \({\mathrm{\pi}}\) bonding MO has lower electron density above and below the internuclear axis.
Statement B :
The \({{\rm{\pi }}^{\rm{*}}}\) anti-bonding MO has a node between the nuclei.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313786 When \({\mathrm{\Psi_{\mathrm{A}}}}\) and \({\mathrm{\Psi_{\mathrm{B}}}}\) are the wave functions of atomic orbitals, then \({\mathrm{\sigma^{*}}}\) is represented by

1 \({\mathrm{\Psi_{A}-\Psi_{B}}}\)
2 \({\mathrm{\Psi_{A}+\Psi_{B}}}\)
3 \({\mathrm{\Psi_{A}+2 \Psi_{B}}}\)
4 \({\mathrm{\Psi_{A}-2 \Psi_{B}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313787 Assertion :
In the bonding molecular orbital (MO) of \(\mathrm{H}_{2}\), electron density is increased between the nuclei.
Reason :
The bonding MO is \(\Psi_{\mathrm{A}}+\Psi_{\mathrm{B}}\), shows destructive interference of the combining electron waves.

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

313788 A bonding molecular orbital is produced by

1 Destructive interference of wave functions
2 Constructive interference of wave functions
3 Pairing of electrons with opposite spins
4 Combination of +ve and –ve wave functions
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313789 If z-axis be the internuclear axis, which of the following combination of orbitals would not form \(\pi\)-bond?

1 \(\mathrm{p}_{\mathrm{x}}+\mathrm{p}_{\mathrm{x}}\)
2 \(\mathrm{d}_{\mathrm{xy}}+\mathrm{d}_{\mathrm{xy}}\)
3 \(\mathrm{d}_{\mathrm{zx}}+\mathrm{d}_{\mathrm{zx}}\)
4 \({{\rm{d}}_{{\rm{yz}}}} + {{\rm{d}}_{{\rm{yz}}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313785 Read the Statement \({\mathrm{A}}\) and Statement B carefully to mark the correct options given below:
Statement A :
A \({\mathrm{\pi}}\) bonding MO has lower electron density above and below the internuclear axis.
Statement B :
The \({{\rm{\pi }}^{\rm{*}}}\) anti-bonding MO has a node between the nuclei.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313786 When \({\mathrm{\Psi_{\mathrm{A}}}}\) and \({\mathrm{\Psi_{\mathrm{B}}}}\) are the wave functions of atomic orbitals, then \({\mathrm{\sigma^{*}}}\) is represented by

1 \({\mathrm{\Psi_{A}-\Psi_{B}}}\)
2 \({\mathrm{\Psi_{A}+\Psi_{B}}}\)
3 \({\mathrm{\Psi_{A}+2 \Psi_{B}}}\)
4 \({\mathrm{\Psi_{A}-2 \Psi_{B}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313787 Assertion :
In the bonding molecular orbital (MO) of \(\mathrm{H}_{2}\), electron density is increased between the nuclei.
Reason :
The bonding MO is \(\Psi_{\mathrm{A}}+\Psi_{\mathrm{B}}\), shows destructive interference of the combining electron waves.

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

313788 A bonding molecular orbital is produced by

1 Destructive interference of wave functions
2 Constructive interference of wave functions
3 Pairing of electrons with opposite spins
4 Combination of +ve and –ve wave functions
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313789 If z-axis be the internuclear axis, which of the following combination of orbitals would not form \(\pi\)-bond?

1 \(\mathrm{p}_{\mathrm{x}}+\mathrm{p}_{\mathrm{x}}\)
2 \(\mathrm{d}_{\mathrm{xy}}+\mathrm{d}_{\mathrm{xy}}\)
3 \(\mathrm{d}_{\mathrm{zx}}+\mathrm{d}_{\mathrm{zx}}\)
4 \({{\rm{d}}_{{\rm{yz}}}} + {{\rm{d}}_{{\rm{yz}}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313785 Read the Statement \({\mathrm{A}}\) and Statement B carefully to mark the correct options given below:
Statement A :
A \({\mathrm{\pi}}\) bonding MO has lower electron density above and below the internuclear axis.
Statement B :
The \({{\rm{\pi }}^{\rm{*}}}\) anti-bonding MO has a node between the nuclei.

1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313786 When \({\mathrm{\Psi_{\mathrm{A}}}}\) and \({\mathrm{\Psi_{\mathrm{B}}}}\) are the wave functions of atomic orbitals, then \({\mathrm{\sigma^{*}}}\) is represented by

1 \({\mathrm{\Psi_{A}-\Psi_{B}}}\)
2 \({\mathrm{\Psi_{A}+\Psi_{B}}}\)
3 \({\mathrm{\Psi_{A}+2 \Psi_{B}}}\)
4 \({\mathrm{\Psi_{A}-2 \Psi_{B}}}\)
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313787 Assertion :
In the bonding molecular orbital (MO) of \(\mathrm{H}_{2}\), electron density is increased between the nuclei.
Reason :
The bonding MO is \(\Psi_{\mathrm{A}}+\Psi_{\mathrm{B}}\), shows destructive interference of the combining electron waves.

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

313788 A bonding molecular orbital is produced by

1 Destructive interference of wave functions
2 Constructive interference of wave functions
3 Pairing of electrons with opposite spins
4 Combination of +ve and –ve wave functions
CHXI04:CHEMICAL BONDING AND MOLECULAR STRUCTURE

313789 If z-axis be the internuclear axis, which of the following combination of orbitals would not form \(\pi\)-bond?

1 \(\mathrm{p}_{\mathrm{x}}+\mathrm{p}_{\mathrm{x}}\)
2 \(\mathrm{d}_{\mathrm{xy}}+\mathrm{d}_{\mathrm{xy}}\)
3 \(\mathrm{d}_{\mathrm{zx}}+\mathrm{d}_{\mathrm{zx}}\)
4 \({{\rm{d}}_{{\rm{yz}}}} + {{\rm{d}}_{{\rm{yz}}}}\)