Covalent bonding electronegativity Fajan's rule and dipole moment - Question Bank
1. Which of the following compounds has the highest dipole moment?
2. The most electronegative element in the second period is:
3. Fajan's rules are based on the concept of:
4. Which of the following is NOT a consequence of dipole moment?
5. The dipole moment of CO is approximately 0.12 D, while that of NO is approximately 0.16 D. This difference is primarily due to:
6. Fajan's rule implies that the bond between a large cation and a large anion is more likely to be:
7. In the series H2O, H2S, H2Se, H2Te, the dipole moment decreases in the order:
8. Which of the following elements has the lowest electronegativity?
9. The percentage ionic character of a bond can be estimated from the ratio of its observed dipole moment to the theoretical dipole moment of:
10. Which of the following factors does NOT influence the dipole moment of a molecule?
11. According to Fajan's rules, a cation with a d10 electron configuration will have:
12. The electronegativity of Carbon is approximately 2.55. The bond between Carbon and Hydrogen (electronegativity 2.20) is:
13. A zero dipole moment indicates that a molecule is:
14. Fajan's rule states that the polarization of an anion increases with:
15. Which of the following has the highest covalent character?
16. The dipole moment of NH3 is greater than that of NF3, even though Fluorine is more electronegative than Hydrogen. This is because:
17. In which of the following compounds does the cation have the highest polarizing power?
18. What is the typical electronegativity of Oxygen on the Pauling scale?
19. Which of the following is the most polar molecule?
20. Fajan's rules primarily apply to ionic compounds to predict the extent of:
21. The electronegativity difference between two atoms A and B is 1.7. The bond between A and B is considered:
22. Which molecule has polar bonds but a zero dipole moment?
23. According to Fajan's rules, increased covalent character in an ionic compound is favored by:
24. The 'dipole moment' is a vector quantity. Its direction is from:
25. Which of the following pairs has the most polar covalent bond?
26. Electronegativity is a measure of the ability of an atom to:
27. Fajan's rules state that a smaller cation with a higher positive charge will:
28. Which of the following is the correct trend for dipole moment in the given hydrides?
29. A molecule with polar bonds can be nonpolar if:
30. Consider the series LiCl, NaCl, KCl, CsCl. The covalent character increases in the order:
31. Which element has an electronegativity value of approximately 4.0 on the Pauling scale?
32. The sum of dipole moments of individual polar bonds in a molecule gives the:
33. Which of the following is NOT a factor influencing electronegativity according to Fajan's rules?
34. The dipole moment of HCl is 1.03 D. If the bond length is 1.27 Å, what is the percentage of ionic character in HCl?
35. Fajan's rules suggest that covalent character is enhanced when the cation has:
36. Which bond has the most polar character?
37. In the molecule BF3, the B-F bonds are polar, but the molecule itself is nonpolar. This is due to:
38. Which of the following statements about electronegativity is FALSE?
39. The unit of dipole moment is typically expressed in:
40. Which of the following molecules is polar?
41. According to Fajan's rules, what characteristic of an anion favors greater covalent character?
42. What is the correct order of increasing electronegativity?
43. A bond formed between two atoms with a large difference in electronegativity is likely to be:
44. Which of the following compounds exhibits the highest ionic character?
45. The dipole moment of a molecule is a measure of its:
46. Which factor increases the polarity of a covalent bond?
47. Fajan's rules primarily explain the degree of covalent character in which type of bond?
48. Which molecule has a net dipole moment of zero due to its symmetrical structure?
49. What is the approximate electronegativity value of Hydrogen on the Pauling scale?
50. According to Fajan's rules, what characteristic of a cation favors greater covalent character in an ionic bond?