Which of the following types of hybridisation exhibits the highest number of 90° bond pair-bond pair electron angles?
 

1. sp3d2 hybridisation.

2. sp3d hybridisation.

3. sp3 hybridisation.

4. dsp2 hybridisation. 

Subtopic:  Hybridisation |
 77%
Level 2: 60%+
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Molecule/Ion that is diamagnetic in nature is: 

1. \(\mathrm{H}^-_2\) 2. \(\mathrm{H}_2\)
3. \(\mathrm{H}^+_2\) 4. \(\mathrm{He}^+_2\)
Subtopic:  M.O.T |
 89%
Level 1: 80%+
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The extent of lattice energy in an ionic compound depends on:

1. Packing of ions only 

2. Size of the ions only 

3. Charge and Size of the ions 

4. Charge on the ions only

Subtopic:  Lattice & Hydration Energy |
 89%
Level 1: 80%+
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The number and type of bonds between two carbon atoms in calcium carbide are 

1. One sigma, two pi

2. Two sigma, two pi 

3. One sigma, one pi 

4. Two sigma, one pi 

Subtopic:  Types of Chemical Bond |
 62%
Level 2: 60%+
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Which among the following does not contain a set of isoelectronic species?

1. SO32-, CO32-,NO3-

2. CN-,N2,CO

3. BO33-,CO32-,NO3-

4. PO43-,SO42-,ClO4-

Subtopic:  Octate, Isoelectronic Species, Lewis Structure & Formal Charge |
 73%
Level 2: 60%+
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Which of the following molecules/ions does not contain unpaired electrons?

(1) O22-

(2) C2-

(3) N2+

(4) O2

 

Subtopic:  M.O.T |
 77%
Level 2: 60%+
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A molecule or ion that has an unequal bond length is:

1. \(\mathrm{SF}_4\) 2. \(\mathrm{SiF}_4\)
3. \(\mathrm{XeF}_4\) 4. \(\mathrm{BF}^-_4\)
Subtopic:  V.S.E.P.R & V.B.T |
 60%
Level 2: 60%+
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Which of the following species exhibits the diamagnetic behaviour?

(1) O2+

(2) O2

(3) NO

(4) O22-

Subtopic:  M.O.T |
 81%
Level 1: 80%+
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The correct increasing order of the polarizing power of the cationic species  K+,Ca2+,Mg2+,Be2+is: 

1. Be2+<K+<Ca2+<Mg2+

2. K+<Ca2+<Mg2+<Be2+

3. Ca2+<Mg2+<Be2+<K+

4. Mg2+<Be2+<K+<Ca2+

Subtopic:  Polarity |
 79%
Level 2: 60%+
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Which one of the following pair of species have the same bond order?

(1) CN- and NO+

(2) CN and CN+

(3) O2- and CN- 

(4) NO+ and CN+

Subtopic:  M.O.T |
 87%
Level 1: 80%+
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