Class 11 Chemistry: Advanced Chemical Bonding

This worksheet challenges students to apply advanced principles of chemical bonding and molecular structure, including VSEPR theory, hybridization, and molecular orbital theory, to complex chemical systems.

Class 11CBSEChemistryhardPractice

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Q1. Which of the following statements about the molecular orbital theory (MOT) of nitric oxide (NO) is incorrect?
- NO has a bond order of 2.5.
- NO is paramagnetic.
- The highest occupied molecular orbital (HOMO) is a π* antibonding orbital.
- The bond length in NO+ is shorter than in NO.
Q2. Consider the species ICl2-, ICl2, and ICl2+. Which of the following statements regarding their shapes and hybridisation is correct?
- ICl2- is linear with sp3d hybridisation.
- ICl2 is linear with sp3 hybridisation.
- ICl2+ is bent with sp2 hybridisation.
- All three species have sp3 hybridisation.
Q3. Which of the following molecules has a non-zero dipole moment despite having non-polar bonds?
- CS2
- CCl4
- BF3
- NH3
Q4. The correct order of increasing s-character in the hybrid orbitals of the central atom in the following molecules/ions: C2H2, C2H4, C2H6, respectively, is:
- sp3 < sp2 < sp
- sp2 < sp3 < sp
- sp < sp2 < sp3
- sp3 < sp < sp2
Q5. According to Fajan's rules, which among the following ionic compounds would be expected to have the highest covalent character?
- NaF
- NaCl
- NaI
- NaBr

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