Electronegativity, Fajan's rule, dipole moment
- Identify the correct orders against the property mentioned :A. H_2O > NH_3 > CHCl_3 - dipole momentB. XeF_4 > XeO_3 > XeF_2 - number of lone pairs on central atomC. O-H > C-H > N-O - bond lengthD. N_2 > O_2 > H_2 - bond enthalpyChoose the correct ans… Answer: 1. A, D only A true: H₂O (1.85 D) > NH₃ (1.47 D) > CHCl₃ (1.04 D). B false: lone pairs on Xe are XeF₄ = 2, XeO₃ = 1, XeF₂ = 3, so th... 1
- Arrange the following elements in increasing order of electronegativity:N, O, F, C, SiChoose the correct answer from the options given below: Answer: 2. Si < C < N < O < F Key idea: electronegativity increases across a period and decreases down a group. Pauling values: Si 1.8 < C 2... 1
- Which of the following molecules is non-polar in nature ? Answer: 3. SbCl₅ Key idea: a molecule is non-polar if its bond dipoles cancel by symmetry. SbCl₅ is a symmetric trigonal bipyramid with no l... 1
- Which of the following set of molecules will have zero dipole moment ? Answer: 4. Boron trifluoride, beryllium difluoride, carbon dioxide, 1,4-dichlorobenzene Zero dipole moment needs a symmetric shape where bon... 1