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%
From NCERT
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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%
From NCERT
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Among the following, the maximum covalent character is shown by which compound:

1. MgCl2

2. FeCl2

3. AlCl3

4. SnCl2

Subtopic:  Covalent Bond |
 69%
From NCERT
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Match the compounds of Xe in column I with the molecular structure in column II.

   Column-I       Column-II

(a) XeF2       (i) Square planar

(b) XeF4     (ii) Linear

(c) XeO3      (iii) Square pyramidal

(d) XeOF4    (iv) Pyramidal

(1) (a)-(ii) (b)-(i) (c)-(iii) (d)-(iv)

(2) (a)-(ii) (b)-(iv) (c)-(iii) (d)-(i)

(3) (a)-(ii) (b)-(iii) (c)-(i) (d)-(iv)

(4) (a)-(ii) (b)-(i) (c)-(iv) (d)-(iii)

Subtopic:  Hybridisation | V.S.E.P.R & V.B.T |
 78%
From NCERT
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The correct relationship for the bond angle of water and dimethyl ether CH3-O....-CH3 is: 

1. Water > dimethyl ether 2. Dimethyl ether > Water
3. Dimethyl ether = Water 4. Can not be determined.
Subtopic:  V.S.E.P.R & V.B.T |
 71%
From NCERT
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The decreasing order of ionic character of the N-H, F-H, C-H, and O-H, is :  

1. N-H > F-H > C-H > O-H
2. F-H > N-H > C-H > O-H
3. O-H > C-H > F-H > N-H
4. F-H > O-H > N-H > C-H

Subtopic:  Ionic Bond |
 82%
From NCERT
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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%
From NCERT
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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%
From NCERT
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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%
From NCERT
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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%
From NCERT
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