WorksheetsPolarity and IMF practice (gen. chem.)
Total questions: 50
Worksheet time: 26mins
Polarity of a molecule is determined by
shape and charge
symmetry/asymmetry of molecule
difference in electronegativity value and size
difference in electronegativity value and charges
Why is the molecule polar?
The shape is bent and there are are lone pairs on the central atom.
There are different types of elements bonded to the central atom.
The molecule is symmetrical
Why is the molecule polar?
There is a lone pair on the central atom and a high electronegative nitrogen pulling the electrons.
There are different types of elements bonded to the central atom.
The electronegativities of the hydrogens pull the electrons away from the nitrogen.
Why is the molecule polar?
The molecule is symmetrical and the hydrogens cancel out the pulling of the Fluorine
There are different types of elements bonded to the central atom. The F pulls the electrons.
There are no lone pairs on the central atom and all of the atoms bonded to the central atom are the same.
Why is the molecule nonpolar?
There are lone pairs on the central atom.
There are different types of elements bonded to the central atom.
There are no lone pairs on the central atom and all of the atoms bonded to the central atom are the same. (symmetrical)
Why is the molecule polar?
There is a lone pair on the central atom, creating a negative side to the molecule.
There are different types of elements bonded to the central atom.
There are no lone pairs on the central atom and all of the atoms bonded to the central atom are the same.
Why is the molecule polar?
There are lone pairs on the central atom.
There are different types of elements bonded to the central atom (not symmetrical)
There are no lone pairs on the central atom and all of the atoms bonded to the central atom are the same.
Why is the molecule nonpolar?
There are lone pairs on the central atom.
There are different types of elements bonded to the central atom.
There are no lone pairs on the central atom and all of the atoms bonded to the central atom are the same (symmetrical).
Polar molecules have
no charges.
slight positive and negative charges on opposite ends of the molecules.
only positive charges.
either positive or negative charges, but not both.
5. CH2Cl2
Polar
Non-polar
3. BrF3
Polar
Non-polar
1. N2
Polar
Non-polar
Is this molecule polar or non-polar?
Polar
Non-polar
Is this molecule polar or non-polar?
Non-polar
Polar
Which of the following molecules is likely to be polar?
CO2
NH3
CH4
Ar
What effect do lone pairs have on molecular polarity?
They make the molecule symmetrical.
They can create an uneven distribution of charge.
They have no effect on polarity.
They always make the molecule nonpolar.
Which of the following molecules is likely to be nonpolar?
H2O
CO2
NH3
CH3Cl
How does the electronegativity difference between atoms affect molecular polarity?
It has no effect on polarity.
A greater difference leads to a more polar molecule.
It only affects nonpolar molecules.
It makes all molecules polar.
Which of the following molecules is likely to be polar?
CO2
H2O
CH4
Ar
What effect does molecular symmetry have on polarity?
It makes the molecule polar.
It has no effect on polarity.
It can make the molecule nonpolar.
It always makes the molecule symmetrical.
What is the hybridization of the central atom in a molecule with four bonding pairs and no lone pairs?
sp
sp2
sp3
sp3d
Ionic bonding involves...
Which substance has the weakest intermolecular forces?
Substance A, boiling point of 75 °C
Substance B, boiling point of 105 °C
Substance C, boiling point of 25 °C
Substance d, boiling point of 45 °C
The weaker the intermolecular forces of a substance the _____________ the boiling point
higher
lower
Which of the following will NOT have hydrogen bonding?
In a polar covalent bond, the electrons gather around...
Mostly the atom with the greatest electronegativity
The atom with the lowest electronegativity
Each atom equally
Only the atom with the greatest electronegativity
In a nonpolar covalent bond, the electrons gather around...
Mostly the atom with the greatest electronegativity
The atom with the lowest electronegativity
Each atom equally
Only the atom with the greatest electronegativity
The polarity of a bond is determined by...
The sum of the electronegativities of the two atoms
The difference in the electronegativities of the two atoms
The charges of the atoms
The number of electrons shared in the bond
dispersial bonding
Which substance would have the weakest intermolecular forces of attraction?
CH4
NaCl
H2O
MgF2
To form a hydrogen bonding, hydrogen needs to attract to the highly electronegative elements such us _____, _____, and ____
chlorine, fluorine, and oxygen
fluorine, oxygen, and sulfur
fluorine, bromine, and oxygen
fluorine, oxygen, and nitrogen
Which of the following molecules is the weakest?
F2
H2O
HCl
SO2
Intermolecular forces for: CO2
Dispersion Force
Dipole dipole
Hydrogen bonding
Which of the following is an intramolecular force?
hydrogen bonding
polar covalent bonding
dispersial bonding
dipole-dipole interaction
What kind of force is the arrow pointing to?
Intramolecular Force
Intermolecular Force
What kind of force is the arrow pointing to?
Intramolecular force
Intermolecular force
Between element Na, Mg, Al, O, F, K and Cl which can have a metallic bond?
Na, Mg, Al, K
Na, Mg, K, Cl
Mg, Al, F, K
O, F, Cl
