Chemical Bonding and Molecular Structure

Which of the following pictorial diagrams most correctly represents the * ( antibonding) molecular orbital between two atoms if the internuclear axis is taken to be in the z-direction ( z-axis) ?

1. [figure]
2. [figure]
3. [figure]
4. [figure]

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :

1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true

Given below are two statements : In the light of the above statements, choose the correct answer from the options given below

1. Both Statement I and Statement II are false
2. Statement I is true but Statement II is false
3. Statement I is false but Statement II is true
4. Both Statement I and Statement II are true

Pair of species among the following having same bond order as well as paramagnetic character will be-

1. O2-, N2+
2. O2+, N22-
3. O2-, N2-
4. O2+, N2-

Which of the following molecule(s) show/s paramagnetic behavior? Choose the correct answer from the options given below:

1. A & C only
2. A & E Only
3. A & D Only
4. B Only

Total number of molecules/species from the following which will be paramagnetic is . O2, O2+, O2-, NO, NO2, CO, K2[NiCl4], [Co(NH3)6]Cl3, K2[Ni(CN)4]

Which of the following linear combination of atomic orbitals will lead to formation of molecular orbitals in homonuclear diatomic molecules [internuclear axis in z-direction] ? Choose the correct answer from the options given below:

1. D Only
2. E Only
3. C and D Only
4. A and B Only

The total number of species from the following in which one unpaired electron is present, is . N2, O2, C2-, O2-, O22-, H2+, CN-, He2+

Total number of electrons present in ( ) molecular orbitals of O2, O2+ and O2- is .

When A and B are the wave functions of atomic orbitals, then is represented by :

1. A + 2 B
2. A - B
3. A - 2 B
4. A + B

Number of molecules having bond order 2 from the following molecules is . C2, O2, Be2, Li2, Ne2, N2, He2

Number of molecules/species from the following having one unpaired electron is . O2, O2-1, NO, CN-1, O22-

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below :

1. Both Statement I and Statement II are true
2. Both Statement I and Statement II are false
3. Statement I is true but Statement II is false
4. Statement I is false but Statement II is true

The linear combination of atomic orbitals to form molecular orbitals takes place only when the combining atomic orbitals Choose the most appropriate from the options given below:

1. B, C, D only
2. A, B, C only
3. B and D only
4. A and C only

The total number of molecular orbitals formed from 2s and 2p atomic orbitals of a diatomic molecule is .

The number of species from the following which are paramagnetic and with bond order equal to one is . H2, He2+, O2+, N22-, O22-, F2, Ne2+, B2

The total number of anti bonding molecular orbitals, formed from 2s and 2p atomic orbitals in a diatomic molecule is .

Sum of bond order of CO and NO+ is .