The electronic configurations of three elements, A, B, and C are given below.  

A 1s2 2s2 2p6
B 1s2 2s2 2p6 3s2 3p3
C 1s2 2s2 2p6 3s2 3p5

The molecular formula of the compound formed from B and C will be 

1. BC

2. B2C

3. BC2

4. BC5

Subtopic:  Resonance & Nature of Compounds |
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The electronic configurations of the elements A, B, and C are given below.

A  = 1s2  2s2  2p6
B  = 1s2  2s2  2p6  3s2  3p3
C =  1s2  2s2  2p6  3s2  3p5

The bond between B and C will be : 

1. Ionic. 2. Covalent.
3. Hydrogen. 4. Coordinate.
Subtopic:  Covalent Bond |
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Among the following, the correct order of energies of molecular orbitals of N2 is-

1. (π2py)<(σ2pz)<(π*2px)(π*2py)

2. (π2py)>(σ2pz)>(π*2px)(π*2py)

3. (π2py)<(σ2pz) (π*2px)(π*2py)

4. (π2py)>(σ2pz)<(π*2px)(π*2py)

Subtopic:  M.O.T |
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From the perspective of molecular orbital theory, which statement is false?

1. Be2 is not a stable molecule.

2. He2 is not stable but He2+ is expected to exist.

3. Bond strength of N2 is maximum amongst the homonuclear diatomic molecules belonging to the second period.

4. The order of energies of molecular orbitals in N2 molecule is: 

σ2s<σ2s*<σ2pz<(π2pxπ2py)
<(π2px*π2py*)<σ2pz*

Subtopic:  M.O.T |
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What is the correct sequence of bond order for the specified species?

1. \(\mathrm{O}^-_2>\mathrm{O}_2>\mathrm{O}^+_2\) 2. \(\mathrm{O}^-_2<\mathrm{O}_2<\mathrm{O}^+_2\)
3. \(\mathrm{O}^-_2>\mathrm{O}_2<\mathrm{O}^+_2\) 4. \(\mathrm{O}^-_2<\mathrm{O}_2>\mathrm{O}^+_2\)
Subtopic:  M.O.T |
 83%
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Match the species in Column I with the type of hybrid orbitals in Column II.

Column I

Column II

A. SF4

1. sp3d2

B. IF5

2. d2sp3

C. NO2+

3. sp3d

D. NH4+

4. sp3

5. sp

Codes

Options:  A   B   C   D 
1. 3 1 5 4
2. 1 2 3 5
3. 5 4 3 2
4. 4 5 3 2

       

Subtopic:  Hybridisation | V.S.E.P.R & V.B.T |
 88%
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Match the species in Column I with the shape in Column II.

Column I

Column II

A. H3O+

1. Linear

B. HCCH

2. Angular

C. ClO2-

3. Tetrahedral

D. NH4+

4. Trigonal bipyramidal

5. Pyramidal

Codes

Options:  A   B   C   D 
1. 5  1  2  3
2. 1  2  3  5
3. 5  4  3  2
4. 4  5  3  2

 

Subtopic:  Hybridisation | V.S.E.P.R & V.B.T |
 89%
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Match the species in Column I with the bond order in Column II.

Column I

Column II

A. NO

1. 1.5

B. CO

2. 2.0

C. O2-

3. 2.5

D. O2

4. 3.0

Codes

Options:  A   B   C   D 
1. 3 4 1 2
2. 1 2 3 5
3. 5 4 3 2
4. 4 5 3 2

Subtopic:  M.O.T |
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Match the items given in Column I with examples given in Column II.

Column I

Column II

A. Hydrogen bond

1. C

B. Resonance

2. LiF

C. Ionic solid

3. H2

D. Covalent solid

4. HF

5. O3

Codes

Options:  A   B   C   D 
1. 2 3 4 1
2. 1 2 3 5
3. 5 4 3 2
4. 4 5 2 1

Subtopic:  Resonance & Nature of Compounds |
 91%
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Match the shape of molecules in Column I with the type of hybridization in Column II.

Column I

Column II

A. Tetrahedral

1. sp2

B. Trigonal

2. sp

C. Linear

3. sp3

Codes

Options:  A   B   C 
1. 3 1 2
2. 1 2 3
3. 5 4 3
4. 4 5 3

       

      

 

Subtopic:  Hybridisation |
 95%
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