U2: Molecular Polarity: Mastery Test

How is geometrical symmetry related to the polarity of a molecule?

• An asymmetrical molecule is always nonpolar.

• An asymmetrical molecule can never be polar.

• A symmetrical molecule is always nonpolar.

• A symmetrical molecule is always polar.

What's a certain indicator that a molecule is polar?

• the molecule has a nonpolar covalent bond and the dipole is cancelled due to symmetrical arrangement of atoms

• the molecule has a polar covalent bond and the dipole is cancelled due to symmetrical arrangement of atoms

• the molecule has a nonpolar covalent bond and the dipole is established due to asymmetrical arrangement of atoms

• the molecule has a polar covalent bond and the dipole is established due to asymmetrical arrangement of atoms

Select the correct answer. Elements | Electronegativity chlorine (Cl) | 3.61 sulfur (S) | 2.58 hydrogen (H) | 2.2 oxygen (O) | 3.44 fluorine (F) | 4 Based on difference in electronegativities between atoms, which is the most polar bond pair?

• H — S

• H — Cl

• H — O

• H — F

Select the correct answer. Four molecules each consist of a central atom with other atoms around it. In each of the molecules, the atoms surrounding the central atom are all of the same element but are different than the central atom. Each of the four molecules has a different shape. Which shape produces a polar molecule?

• linear

• trigonal planar

• bent

• tetrahedral

Which term is used to describe a molecule that has a partial positive charge at one end and a partial negative charge at the other end?

• nonpolar

• dipole

• planar

• linear

Which molecule is polar, based on structure?

• sulfur dioxide

• carbon disulphide

• ethylene

• carbon tetrachloride

Tags

NGSS.HS-PS1-1

Why is hydrogen chloride (HCl) polar?

• it has equally shared electrons

• it has unequally shared electrons

• it has bent asymmetry

• it has linear symmetry

Tags

NGSS.HS-PS1-2

Select the correct answer. Which molecule among these is polar?

• NH3

• BCl3

• O2

• NO3-

Tags

NGSS.HS-PS1-1

Select the correct answer.

• nitrogen trichloride

• sulfur hexachloride

• nitrogen

• carbon disulphide

Which is a polar molecule?

• nitrogen trichloride

• sulfur hexachloride

• nitrogen

• carbon disulphide