Episode No – 30
Faculty: Dr. Ashraf Khan
Chemical Bonding & Molecular Structure
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In which of the following species the central atom has type of hybridization which isnot as that
present in other three H =
[V+X-C+A]
-
a) I 3
b) XeF4
c) PCI5
d) SF4
Ans: b)
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In which of the following, the central atom has one | one pair and three bond pair
a) H2O
b) NH-2
c) PCl3
d) BF3
Ans: c)
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Which of the following pairs are iso structural?
a) NH+4 and NH3
b) CH4 and BF-4
c) NH-2 and BeF2
d) PCl3 and BF3
Ans: b)
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The angle between the covalent bond is maximum in
a) CH4
b) NH3
c) H2O
d) BF3
Ans: d)
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Which of the following has non zero dipole
a) BF3
b) SiF4
c) PCl5
d) SF4
Ans: d)
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Which of the following are arranged in an increasing order of bond strengths?
a) O -2 < O2 < O+2 < O22
b) O22- < O -2 < O2 < O+2
c) O -2 < O 2-2 < O2 < O+2
d) O+2 < O2 < O -2 < O 2-2
Ans: b)
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Bond stability of H2+, H2- and H2
a) H2+ > H2 > H-2
b) H2- > H2+ > H2
c) H2 > H2+ > H2d) H2- > H2 > H2+
Ans: c)
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When O2 is converted to O+2 . . . . . . .
a) Paramagnetic character decreases and bond order increases.
b) Paramagnetic character increases.
c) Bond order decreases.
d) Both Paramagnetic character and bond order increases.
Ans: a)
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Which one of the following has No Unpaired electron (Diamagnetic) ?
a) O-2
b) O+2
c) O—2
d) O2
Ans: c)
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Which has maximum covalent character
a) LiF
b) LiCl
c) LiBr
d) LiI
Ans: d)
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Which has maximum covalent character
a) LiCl
b) BeCL2
c) naCl
d) BaCl2
Ans: b)