One of the most fundamental chemistry principles, chemical bonding, helps explain other concepts like molecules and reactions. Without it, scientists would be unable to explain why atoms are drawn to one another or how products are created after a chemical reaction has taken place. One must first understand the fundamentals of atomic structure to comprehend the concept of bonding.
Download the Class 11 Chemistry Worksheet on Chapter 4 Chemical Bonding and Molecular Structure Set 4 PDF.
CBSE Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure – Set 4
Q-1: The compound’s formula is X2Y5. How many electrons are in X’s and Y’s respective outermost orbits?
a) 6 and 3
b) 5 and 6
c) 5 and 2
d) 2 and 3
Q-2: In which of the following bond angle is maximum?
a) NH3
b) SiCl4
c) Br3–
d) SCl2
Q-3: The electron adds in one of the following orbitals during the transition from O2 to O2–ion. What is it?
a) 𝞹 orbitals
b) 𝞹* orbitals
c) 𝞼 orbitals
d) 𝞼* orbitals
Q-4: Which of the following pairs are isostructural?
a) XeF2, IF2–
b) NH3, BF3
c) CO32-, SO32-
d) PCl5, IF5
Q-5: Which of the following compound is electron deficient?
a) NCl3
b) CH4
c) BCl3
d) PCl3
Q-6: In each of the following pairs of compounds, which one is more covalent and why?
i) AgCl, AgI
ii) CuO, CuS
iii) SnCl2, SnCl4
Q-7: What do you understand by covalent and van der Waals radii?
Q-8: In the overall trigonal bipyramidal arrangement of the SF4 molecule, the lone pairs of electrons occupy an equatorial position instead of an axial one. Why?
Q-9: In each of the following molecules, which bond do you anticipate to be stronger and why?
i) Cl-Cl, H-H
ii) O2, N2
iii) F-F, Cl-Cl
Q-10: Which of the following molecules will have a higher dipole moment? Explain your prediction.
OCS and CS2
Q-11: Account for the following:
a) The experimentally determined bond length of the N-F bond in NF3 exceeds the sum of the radii of the N and F covalent bonds.
b) The stannous chloride molecule is angular in contrast to the linear MgCl2 molecule.
Q-12: Utilising VSEPR theory, explain the non-planar shape of PCl3 and the non-linear shape of H2S.
Q-13: Why does HCl tend to be ionic in the aqueous solution but predominantly covalent in the aqueous state?
Q-14: What is the total number of sigma bonds and pi-bonds in the following molecules?
a) C3H5Cl
b) CH2F2
c) SO3
Q-15: Explain the significance of bond order. Can bond order be used for quantitative comparisons of the strength of chemical bonds?
Q-16: Based on molecular orbital theory, what is similar between
a) F2, O22-
b) He2+, H2–
Q-17: What do you mean by a dipole moment? Give its SI units.
Q-18:
i) Which d-orbital is involved in dsp2 hybridisation?
ii) Write the electronic configuration and Lewis symbol for N3-.
Q-19: What are the conditions for the linear combination of atomic orbitals to form molecular orbitals?
Q-20: Why is C6H12O6 soluble in water though it is covalent in nature?
Download the PDF to access answers to the Chemistry Worksheet for Class 11 Chemistry Chapter 4 Chemical Bonding and Molecular Structure Set – 4.
