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Polarity is also determined by the shape of a molecule. Molecules that are symmetrical tend to be nonpolar. Molecules that are asymmetrical tend to be polar. Polarity is like a game of tug-o-war. If there is an equal "pull" on the central atom from all sides, then the molecule is nonpolar. If there is an unequal "pull" on the central atom because of unshared electrons, then the molecule is polar. Water is a polar molecule. Refer to Example A attached to see the lone pairs of electrons attached to oxygen that keeps the molecule from being symmetric. You will need to view the attached images to complete this quiz. Select the best answer from the choices.
Is this molecule polar or nonpolar?
Polar
Non polar
Which element is the more electronegative?
Sulphur
Hydrogen
Both
Can’t say
How would you describe the molecular polarity and the charge distribution of NF3?
Nonpolar molecule, asymmetrical distribution of charge
Polar molecule, asymmetrical distribution of charge
Nonpolar molecule, symmetrical distribution of charge
Polar molecule, symmetrical distribution of charge
How would you describe the molecular polarity and the charge distribution of CF4?
Nonpolar molecule, asymmetrical distribution of charge
Polar molecule, asymmetrical distribution of charge
Nonpolar molecule, symmetrical distribution of charge
Polar molecule, symmetrical distribution of charge
Why is a molecule of 1-octanol polar?
It has an asymmetrical distribution of charge
It has an symmetrical distribution of charge
What is the molecular polarity of H2?
Polar
Non polar
What is the molecular polarity of NCl3?
Polar
Non polar
What is the molecular polarity of CO?
Polar
Non polar
