Which one of the following species does not exist?

1. Be2+

2. Be2

3. B2

4. N2

 

Subtopic:  M.O.T |
 61%
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In a regular octahedral molecule MX6, the number of X-M-X bonds at 180° is-

1. 3

2. 2

3. 6

4. 4

Subtopic:  Hybridisation |
 61%
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The correct order of increasing bond angles in the following species is

1. Cl2O < ClO2ClO2-

2. ClO2 < Cl2O < ClO2-

3. Cl2O < ClO2- < ClO2  

4. ClO2- < ClO2 < Cl2

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In which of the following species the central atom has the type of hybridisation which is not the same as that present in the other three ?

1. SF4

2. I3-

3. SbCl52-

4. PCl5

Subtopic:  Hybridisation |
 58%
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In BrF3 molecule, the lone pairs occupy equatorial positions to minimize:

1. Lone pair-bond pair repulsion.
2. Bond pair-bond pair repulsion.
3. Lone pair-lone pair repulsion and lone pair-bond pair repulsion.
4. Lone pair-lone pair repulsion.

Subtopic:  Hybridisation |
 52%
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In which of the following pairs, the two species are isostructural?

1. SF4 and XeF4

2. SO32- and NO3-

3. BF3 NF3

4. BrO3- and XeO3

Subtopic:  Hybridisation |
 68%
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In which one of the following molecules, the central atom said to adopt sp2 hybridisation ?

1. BeF2

2. BF3

3. C2H2

4. NH3

Subtopic:  Hybridisation |
 74%
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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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