Which of the following would have a permanent dipole moment ?

1. BF3

2. SiF4

3. SF4

4. XeF4

Subtopic:  Polarity |
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In the case of alkali metals, the covalent character decreases in the order

1. MCl > MI > MBr > MF

2. MF > MCl >  MBr > M

3. MF > MCl > MI > MBr

4. MI > MBr > MCl > MF

Subtopic:  Polarity |
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Which of the following two are isostructural? 

1. XeF2, and IF2-

2. NH3, and BF3

3. CO2, and SiO2

4. PCl5, and IF5

Subtopic:  Types of Chemical Bond |
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Which one of the following species does not exist?

1. Be2+

2. Be2

3. B2

4. N2

 

Subtopic:  M.O.T |
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Which one of the following is not paramagnetic ?

1. NO

2. N2+

3. CO

4. O2-

Subtopic:  M.O.T |
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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 |
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Which of the following is not isostructural with SiCl4

1. SCl4     

2. SO42-

3. PO43-

4. NH4+

Subtopic:  Hybridisation |
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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 |
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Which of the following has   - bonding?

1. NO3-

2. SO32-

3. BO33-

4.CO32-

Subtopic:  Hybridisation |
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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 |
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