Q11Multiple choice
In which of the following substances will the hydrogen bond be strongest?
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Correct option: B
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Worked solution
Option (ii) is the answer.
NCERT Exemplar · Class 11 · Chemistry
Chapter 4: Chemical Bonding and Molecular Structure
Practice each question, then open the answer or worked solution.
Questions
51 questionsQ12Written answer
If the electronic configuration of an element is 1s2 2s2 2p6 3s2 3p6 3d2 4s2, the
four electrons involved in chemical bond formation will be_____.
(i) 3p6
(ii) 3p6, 4s2
(iii) 3p6, 3d2
(iv) 3d2, 4s2
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Worked solution
Option (iv) is the answer.
Q13Multiple choice
Which of the following angle corresponds to sp2 hybridisation?
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Correct option: B
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Worked solution
Option (ii) is the answer
The electronic configurations of three elements, A, B and C are given below.
Answer questions 14 to 17 on the basis of these configurations.
A 1s2 2s2 2p6
B 1s2 2s2 2p6 3s2 3p3
C 1s2 2s2 2p6 3s2 3p5
Q14Written answer
The stable form of A may be represented by the formula :
(i) A
(ii) A2
(iii) A3
(iv) A4
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Worked solution
Option (i) is the answer.
Q15Written answer
The stable form of C may be represented by the formula :
(i) C
(ii) C2
(iii) C3
(iv) C4
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Worked solution
Option (ii) is the answer.
Q16Written answer
The molecular formula of the compound formed from B and C will be
(i) BC
(ii) B2C
(iii) BC2
(iv) BC3
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Worked solution
Option (iv) is the answer.
Q17Written answer
The bond between B and C will be
(i) Ionic
(ii) Covalent
(iii) Hydrogen
(iv) Coordinate
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Worked solution
Option (ii) is the answer.
Q18Multiple choice
Which of the following order of energies of molecular orbitals of N2 is correct?
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Correct option: A
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Option (i) is the answer.
Q19Multiple choice
Which of the following statement is not correct from the viewpoint of molecular
orbital theory?
is expected to exist.
molecules belonging to the second period.
molecule is
σ2s < σ*2s < σ2pz< (π2px = π2py ) < (π*2px= π*2py) < σ*2pz
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Correct option: D
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Worked solution
Option (iv) is the answer.
Q20Multiple choice
Which of the following options represents the correct bond order :
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Correct option: B
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Worked solution
Option (ii) is the answer.