Chemistry Chapter 3 Short Questions For Class 11

The most important chemistry chapter 3 short questions for class 11. The 1st-year chapter 3 of chemistry is related to gases. These questions are for the Punjab Textbook Board and can be used within all of Punjab where this syllabus is taught.

Students are advised to prepare these questions in order to perform the best in the board examination.

Chemistry Chapter 3 Short Questions for Class 11

Define dipole.
Define bond order.
Define permanent dipole-permanent dipole force.
Define London dispersion force.
Draw the Lewis (electron dot) structure for HCN, NCL₃, CO, O₃, and NO₂.
Explain the difference between the formation of π and σ bonds in terms of VBT.
Draw the structure of propanone.
Can propanone make hydrogen bond with water when both are intermixed?
Predict the shapes of sulfate (SO₄²⁻), borate (BO₄⁻), and tri-iodide (I₃⁻) ions according to the VSEPR model.
Sketch the molecular orbital pictures of π(2p) and π*(2p).
Sketch the hybrid orbitals and bond formation in PCl₃, SiCl₄, and NH₄.
The structures of PF₃ and SIF₄ are given below. Redraw these with partial charges and state which is polar and which is non-polar.

Draw the orbital structures of the CO₂ molecule in terms of VBT.
Draw the Lewis structures and tell whether these ions involve expanded octets.
(i)CLO₄⁻ (ii) ICl₄⁻ (iii) NH₄⁺ (iv) I₃⁻
The bond between K and Cl is ionic, but that between Si and Cl is polar covalent. Explain why?
SO₂ is a polar molecule, but SO₃ is not. Justify.
Which of O₂²⁺ and O₂²⁻ would be paramagnetic? Give reason in the light of MOT.
Which of the following bonds would be most polar?
(i) C – Cl (ii) Si – F (iii) Se – F
Compare the bond energies of single, double, and triple bonds between the same two atoms.
Define “ionic bond” with an example.
Define bond energy. What are the factors influencing bond energy?
How do you compare the bond strengths of polar and nonpolar molecules?
Differentiate between a coordinate covalent bond and a covalent bond.
What is the basic assumption of VSEPR theory?
Why are the bond angles of H₂O and NH₃ not equal to 109.5°, like that of CH₄, although oxygen and nitrogen atoms are sp³ hybridized?
Why does the lone pair of electrons occupy more space as compared to the bond pair?
Write two points of VBT.
Draw the orbital picture of the N₂ molecule and also calculate its bond order.
Differentiate between bonding and antibonding molecular orbitals.
Define dipole moment and write the units of dipole moments.
Define bond length. Give two factors affecting bond length.