The H-O-H bond angles in H3O+ are approximately 107°. The orbitals used by oxygen in these bond are best describe as: 

1. orbitals

2. sp hybrid orbitals

3. sp2 hybrid orbital

4. sp3 hybrid orbital

Subtopic:  Hybridisation |
 72%
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Which of the following molecular species is not linear?

(1) (CN)2                                                       

(2) OCN-

(3) XeF2                                                         

(4) S32-

Subtopic:  Hybridisation |
 64%
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Which of the following statement is correct about I3+and I3- molecure ions?

  (1) Number of lone pairs at central atoms are samein both molecure ions

  (2) Hybridization of central atoms in both ions are same

  (3) both are polar spacies

  (4) both are planar spacies

Subtopic:  Hybridisation |
 54%
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The compound that has the highest ionic character associated with the X-Cl bond is:

1. PCl5 

2. BCl3

3. CCl4

4. SiCl4

Subtopic:  Polarity |
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In which of the folllowing transformations, the bond order has increased and the magnetic behaviour has changed?

(a) C2+C2                      (b) NO+NO

(c) O2O2+                       (d) N2N2+

Subtopic:  M.O.T |
 56%
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The bond having the highest bond energy is :

(1) C=C 

(2) C=S

(3) C=O

(4) P=N

Subtopic:  Covalent Bond |
 61%
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H.O.M.O. (Highest Occupied Molecular Orbital) of CO molecular is :

(1) Non-bonding M.O. with slight antibonding character

(2) Non-bonding M.O. with slight bonding character

(3) Pure non-bonding M.O.

(4) None of the above

Subtopic:  V.S.E.P.R & V.B.T |
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An incorrect match among the following is:

Electron geometry  Possible molecular shape from respective electron                                                                                                                                         geometry
1.  Tetrahedron   Bent
2. Trigonal bipyramidal      Triangular planar
3. Octahedron        Square Pyramidal
4. Pentagonal bipyramidal    Pentagonal planar

Subtopic:  Lattice & Hydration Energy |
 51%
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In which of the following species central atom is NOT surrounded by exactly 8 valence electrons?

(1) BF4-

(2) NCl3

(3) PCl4+

(4) SF4

Subtopic:  Types of Chemical Bond |
 56%
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The structure of B3N3H6 is as follows :

                                

How many derivative structures of B3N3H4X2 can be derived from the basic structure, by the

replacement of two hydrogen atoms?

(a) 2                                         (b) 3

(c) 4                                         (d) 5    

Subtopic:  Hybridisation |
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