Kossel - Lewis Approach to Chemical Bond Formation NEET Questions

Physical Chemistry - Chemical Bonding and Molecular Structure

Kossel - Lewis Approach to Chemical Bond Formation MCQ Questions


1.
Who proposed the octet rule?
A.
Kossel and Lewis
B.
Mendeleev
C.
Pauling
D.
Lavoisier
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ANSWER :
A. Kossel and Lewis
2.
In Lewis structures, the shared pair of electrons represents
A.
A coordinate bond
B.
A lone pair
C.
A covalent bond
D.
An ionic bond
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ANSWER :
C. A covalent bond
3.
Which of the following species does not obey the octet rule?
A.
CH₄
B.
BF₃
C.
H₂O
D.
NH₃
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ANSWER :
B. BF₃
4.
The Lewis dot symbol for calcium (Ca) is:
A.
Ca•
B.
Ca••
C.
Ca••••
D.
Ca⁸
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ANSWER :
B. Ca••
5.
Which noble gas configuration is achieved by Na⁺?
A.
He
B.
Ne
C.
Ar
D.
Xe
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ANSWER :
B. Ne
6.
In the formation of ionic bond, the essential condition is:

NEET - 2022

A.
High ionization enthalpy of one atom
B.
High electron gain enthalpy of one atom
C.
High electronegativity of both atoms
D.
Low ionization enthalpy of one and high electron gain enthalpy of other atom
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ANSWER :
D. Low ionization enthalpy of one and high electron gain enthalpy of other atom