Among LiCl, BeCl2, BCl3 and CCl4, the covalent bond character varies as

(1) LiCl < BeCl2 > BCl3 > CCl4

(2) LiCl > BeCl2 < BCl3 < CCl4

(3) LiCl < BeCl2 < BCl3 < CCl4

(4) LiCl > BeCl2 > BCl3 > CCl4

Concept Questions :-

Acid, Base and Fajan's Rule
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Which of the following statement is not correct from the view point of molecular orbital theory ?

(1) Be2 is not a stable molecule

(2) He2 is not a stable but He2+ is expected to exist.

(3) Bond strength of N2 is maximum amongst the homonuclear diatomic molecules belonging to the second period.

(4) The order of energies of molecular orbitals in N2 molecule is

 s2s < s*2s < s2pz < (p2px=p2py) < (p*2px=p*2py) < s*2pz  

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Which of the following compound does not exhibit Hydrogen bonding ?

Concept Questions :-

Hydrogen Bonding
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PCl5 is highly unstable and in solid state it exists as into  [PCl4]and [PCl6]ions.

The geometry of [PCl6]- is   

(1) octahedral

(2) tetrahedral

(3) square pyramidal

(4) square planar

Concept Questions :-

Hybridisation
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Which of the following species has maximum number of lone-pair of electrons on the central atom ?

(1) XeF2

(2) H3O+

(3) XeF4

(4) XeF6

 

Concept Questions :-

Hybridisation
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Which of the following gas is least polarizable ?

1. He

2. Ne

3. Kr

4. Xe

Concept Questions :-

Acid, Base and Fajan's Rule
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Which of the following statements is correct for compound HgCl2, SnCl2 and F2O have 

(1) all have linear shape

(2) HgCl2 and SnCl2 are linear and HgCl2 is V-shaped

(3) HgCl2 is linear while SnCl2 and F2O are V-shaped

(4) none of these

Concept Questions :-

Hydrogen Bonding
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The types of hybrid orbitals of nitrogen in NO2+, NO3- and NH4+ respectively are expected to be

(1) sp, sp3 and sp2

(2) sp, sp2 and sp3

(3) sp2, sp and sp3

(4) sp2, sp3 and sp

Concept Questions :-

Hybridisation
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Overlap of which of the following atomic orbitals would be maximum to form the strongest
covalent bond.

(1) 1s-2s (σ)

(2) 1s-2p (σ)

(3) 2p-2p (π)

(4) 2p-2p (σ)

Concept Questions :-

Covalent Bonding
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AsF5 molecule is trigonal bipyramidal. The hybrid orbitals used by As-atoms for bonding are

(a) dx2-y2, dz2, s, px, py

(b) dxy, s,px, py, pz

(c) s, px, py, pz, dxy

(d) dz2, s, px, py, pz

Concept Questions :-

Covalent Bonding
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