Question

hester, treyvon dtal - ch - term 1 - unit 4b assessment - 25 - 26 which of the following molecular structures results in a polar compound?

Explanation:

Step1: Understand polarity concept

Polarity occurs when there is a significant electronegativity difference and an asymmetrical molecular shape.

Step2: Analyze first structure (CH₄)

In CH₄ (tetrahedral), the C - H bonds have small electronegativity differences and the molecule is symmetrical, so it is non - polar.

Step3: Analyze second structure (H₂C = O)

In H₂C = O, the C = O bond has a large electronegativity difference (O is more electronegative than C), and the molecule is trigonal planar with an asymmetrical distribution of charge, making it polar.

Step4: Analyze third structure (BH₃)

In BH₃ (trigonal planar), the B - H bonds have small electronegativity differences and the molecule is symmetrical, so it is non - polar.

Step5: Analyze fourth structure (CO₂)

In CO₂ (linear), although C = O bonds are polar, the molecule is symmetrical, and the bond dipoles cancel out, making it non - polar.

Answer:

The second - structure (H₂C = O) results in a polar compound.