11 out of 13
Which of the following types of bonds has the least electronegativity difference between the bonding atoms?
|B||Polar covalent bond|
|C||Nonpolar covalent bond|
|D|| Cannot be predicted without the actual electronegativity data.|
Ans. C An ionic bond is formed mainly when there is a noticeable electronegativity difference between the atoms. Usually ionic bonds have the highest electronegativity difference. Choice A is incorrect. Covalently bonded atoms have lesser electronegativity difference. Among Choices B and C, nonpolar covalent bonds obviously have the least electronegativity difference. So our answer is C. Choice D is not true in this case. We do not need any more data to predict this general trend.