According to molecular orbital theory which of the following lists rank the nitrogen species in terms of increasing bond order ?

1. N2- < N2 < N22-

2. N22- < N2- < N2

3. N2 < N22- <N2-

4. N2- < N22- < N2

Subtopic:  M.O.T |
 83%
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Among the following molecules/ions BF3, NO2-, NH2- , and H2O, the central atom is sp2 hybridized in :  

1. NO2and NH2-

2. NH2-  and H2O

3. NO2- and H2O

4. BFand NO2-

Subtopic:  Hybridisation |
 85%
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Which one of the following is planar ?

1. XeF4

2. XeO4

3. XeO3

4. XeO3F2

Subtopic:  Hybridisation |
 68%
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In PO43- ion, the formal charge on each oxygen atom and P-O bond order respectively are :

1. -0.75, 0.6

2. -0.75, 1.0

3. -0.75, 1.25

4. -3.1, 1.25

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
 68%
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The dielectric constant of H2O is 80. The electrostatic force of attraction between Na+ and Cl- will be

1. reduced to 140 in water than in air

2. reduced to 180 in water than in air

3. will be increased to 80 in water than in air

4. will remain unchanged

Subtopic:  Ionic Bond |
 66%
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Which of the following is isoelectronic? 

1. CO2, NO2

2. NO2-, CO2

3. CN-, CO

4. SO2, CO2

Subtopic:  Types of Chemical Bond |
 80%
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The correct order of the increasing bond angles in the following triatomic species is :  

1. \(\mathrm{NO}^-_2<\mathrm{NO}^+_2<\mathrm{NO}_2\) 2. \(\mathrm{NO}^-_2<\mathrm{NO}_2<\mathrm{NO}^+_2\)
3. \(\mathrm{NO}^+_2<\mathrm{NO}_2<\mathrm{NO}^-_2\) 4. \(\mathrm{NO}^+_2<\mathrm{NO}^-_2<\mathrm{NO}_2\)
Subtopic:  V.S.E.P.R & V.B.T |
 69%
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In an octahedral structure, the pair of d orbitals involved in d2sp3-hybridisation is

1. dx2-y2, dz2

2. dxy, dx2-y2

3. dz2, dxz

4. dxy, dyz

Subtopic:  Covalent Bond |
 75%
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Equilateral shape has

1. sp hybridisation

2. sp2 hybridisation

3. sp3 hybridisation

4. dsp2 hybridisation

Subtopic:  Hybridisation |
 63%
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AsF5 molecule is trigonal bipyramidal. The hybrid orbitals used by As-atoms for bonding are

1. dx2-y2, dz2, s, px, py

2. dxy, s,px, py, pz

3. s, px, py, pz, dxy

4. dz2, s, px, py, pz

Subtopic:  Covalent Bond |
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