Which of the following set of molecules will have zero dipole moment?

1.  Boron trifluoride, hydrogen fluoride,  carbon dioxide, 1 3-dichlorobenzene

2.  Nitrogen trifluoride, beryllium difluoride,  water, 1 3 -dichlorobenzene

3.  Boron trifluoride, beryllium difluoride, carbon dioxide, 1 4-dichlorobenzene

4.  Ammonia, beryllium difluoride, water,  1, 4-dichlorobenzene

Subtopic:  Polarity |
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Match the following :

Oxide Nature
(a) CO (i)  Basic
(b) BaO (ii) Neutral
(c) Al2O3 (iii) Acidic 
(d) Cl2O7 (iv) Amphoteric

Which of the following is the correct option? 

a b c d
1. (ii) (i) (iv) (iii)
2. (iii) (iv) (i) (ii)
3. (iv) (iii) (ii) (i)
4. (i) (ii) (iii) (iv)
Subtopic:  Acidic, Basic Character & Fajan's Rule |
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A molecule that can not exist is-

1. Li2

2. C2

3. O2

4. He2

Subtopic:  M.O.T |
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Electron deficient species among the following is: 

1. PH3

2. (CH3)2

3. BH3

4. NH3

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
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Xe F2 is isostructural with : 

1. SbCl3

2. BCl3

3. TeF2

4. ICl2-

Subtopic:  Hybridisation |
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Non-Zero dipole moment is shown by : 

1. CO2

2. p-Dichlorobenzene

3. Carbontetrachloride

4. Water.

Subtopic:  Polarity |
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An incorrect statement regarding resonating structures is : 

1. The contributing structure must have the same number of unpaired electrons.

2. The contributing structures should have similar energies.

3. The resonance hybrid should have a higher energy than any of the contributing structures.

4. None of the above.

Subtopic:  Resonance & Nature of Compounds |
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An ion having  the shortest bond length among the following is -

1. O2+

2. O2-

3. O22-

4. O22+

Subtopic:  M.O.T |
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Assuming that Hund's rule is violated, the bond order and magnetic nature of the diatomic molecule B2 is:

1. 1 and diamagnetic

2. 0 and diamagnetic

3. 1 and paramagnetic

4. 0 and paramagnetic

Subtopic:  M.O.T |
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The species having pyramidal shape is:

(1) SO3

(2) BrF3

(3) SiO32-

(4) OSF2

Subtopic:  Hybridisation |
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