Question

8 multiple choice 1 point which of following compounds is polar? nh3 co2 cbr4 i2

Explanation:

Step1: Analyze $NH_3$

$NH_3$ has a trigonal - pyramidal shape. Nitrogen is more electronegative than hydrogen, and the bond - dipoles do not cancel out, resulting in a net dipole moment. So it is polar.

Step2: Analyze $CO_2$

$CO_2$ is linear. The bond - dipoles are equal in magnitude but opposite in direction, so they cancel out, and the molecule is non - polar.

Step3: Analyze $CBr_4$

$CBr_4$ has a tetrahedral shape. The bond - dipoles are symmetrically arranged and cancel each other out, making the molecule non - polar.

Step4: Analyze $I_2$

$I_2$ is a non - polar molecule as it consists of two identical iodine atoms, and there is no electronegativity difference between them.

Answer:

A. $NH_3$