Polarity of Molecules

The following molecules have polar covalent bonds EXCEPT?

• A. NH₃

• B. CS₂

• C. BCl₃

• D. HBr

Which of the following bonds is the MOST polar?

• A. H-Cl

• B. C-Cl

• C. H-H

• D. N-F

What is the molecular shape of CHBr₃?

• A. Linear

• B. Trigonal planar

• C. Trigonal bipyramidal

• D. Tetrahedral

A nonpolar covalent bond would form in which of the following pairs of atoms?

• A. Na-Cl

• B. Ca-O

• C. P-N

• D. C-S

From the given Lewis structure of NH₃, how many nonbonding pair/s of electron are around the central atom?

• A. 0

• B. 1

• C. 2

• D. 3

Which of the following IMFAs is considered as the weakest?

• A. H-bonding

• B. Ion-dipole

• C. Dipole-dipole

• D. London forces

The boiling point of water is greater than dihydrogen sulfide because of ______.

• A. Dipole-dipole bond

• B. H-bonding

• C. London dispersion

• D. Ion-dipole

Which of the following substances will dissolve most likely in water?

• A. Oil

• B. Carbon tetrachloride (CCl₄)

• C. Vinegar (CH₃COOH)

• D. Hexane (C₆H₁₄)

Which of the following molecules has high melting point?

• A. CHCl₃

• B. CCl₄

• C. BCl₃

• D. BeCl₂

______ refers to the energy required to increase the surface area by a unit amount.

• A. Viscosity

• B. Surface tension

• C. Vapor pressure

• D. Density