Covalent Bonding (Concept of Electronegativity. Fajan’s Rule, Dipole Moment) NEET Questions

Physical Chemistry - Chemical Bonding and Molecular Structure

Covalent Bonding (Concept of Electronegativity. Fajan’s Rule, Dipole Moment) MCQ Questions


7.
Which of the following bonds has the highest ionic character?
A.
H-F
B.
H-Br
C.
H-Cl
D.
H-I
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ANSWER :
A. H-F
8.
If the electronegativity difference between two atoms A and B is 1.7, the bond is approximately:
A.
Pure covalent
B.
Purely ionic
C.
50% ionic and 50% covalent
D.
Coordinate
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ANSWER :
C. 50% ionic and 50% covalent
9.
Which of the following correctly represents the order of electronegativity?
A.
O > F > N > C
B.
F > O > N > C
C.
N > O > F > C
D.
C > N > O > F
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ANSWER :
B. F > O > N > C
10.
The electronegativity of an element is influenced by:
A.
Only the number of valence electrons
B.
Only the nuclear charge
C.
Both nuclear charge and atomic size, along with the hybridization state
D.
Only the atomic size
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ANSWER :
C. Both nuclear charge and atomic size, along with the hybridization state
11.
When two atoms with different electronegativities form a bond, the resulting bond is:
A.
Always coordinate
B.
Always purely covalent
C.
Always purely ionic
D.
Polar covalent if the electronegativity difference is moderate
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ANSWER :
D. Polar covalent if the electronegativity difference is moderate
12.
Which of the following sp hybridized carbon atoms is most electronegative?
A.
C in C₂H₄ (sp²)
B.
All have equal electronegativity
C.
C in C₂H₂ (sp)
D.
C in CH₄ (sp³)
😑 View Answer Rough Work Error
ANSWER :
C. C in C₂H₂ (sp)