The maximum number of 90° angles between bond pair-bond pair of electrons is observed in : 

1. sp3d2 hybridization.

2. sp3d hybridization.

3. sp3 hybridization.

4. dsp2 hybridization. 

Subtopic:  Hybridisation |
 76%
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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 |
 88%
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The lattice energy of an ionic compound depends upon 

1. packing of ions only 

2. size of the ion only 

3. charge on the ion and size of the ion 

4. charge on the ion only

Subtopic:  Lattice & Hydration Energy |
 89%
From NCERT
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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%
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Which among the following does not contain a set of isoelectronic species?

1. SO3-2, CO32-, NO3-

2. CN-, N2, CO

3. BO33- , CO32- ,NO3-

4. PO43-, SO42-, ClO4-

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

(1) O2 2-

(2) C2-

(3) N2+

(4) O2

 

Subtopic:  M.O.T |
 76%
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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 |
 59%
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Which of the following species exhibits the diamagnetic behaviour?

(1) O2 +

(2) O2

(3) NO

(4) O2 2-

Subtopic:  M.O.T |
 81%
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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 |
 78%
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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 |
 88%
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