AP BIOLOGY

BIOCHEMISTRY

POLAR AND NONPOLAR MOLECULES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following geometries could be nonpolar?
A
bent
B
tetrahedral
C
trigonal pyrimidal
D
none of the above
Explanation: 

Detailed explanation-1: -(c). Tetrahedral can be nonpolar, and square planar can be nonpolar. Square planar is similar to tetrahedral with four bonds, but the square planar has two lone pairs.

Detailed explanation-2: -Molecules in which all of the atoms surrounding the central atom are the same tend to be nonpolar if there are no lone pairs on the central atom. If some of the atoms surrounding the central atom are different, however, the molecule may be polar.

Detailed explanation-3: -Answer: CCl4, a carbon tetrachloride, is stated to be nonpolar. The reason for this is that all four bonds in carbon tetrachloride are symmetrical and also, and they are extended in all directions.

There is 1 question to complete.