Worksheets4.5 Intermolecular forces and polarity
Total questions: 15
Worksheet time: 25mins
Name
Class
Date
1.
Covalent bond is equal sharing of electron. Polar covelent bond is
a)
unequal sharing of electrons
b)
different distribution of electrons
c)
presence of hydrogen bonding
d)
presence of polar atoms
2.
Define electronegativity
a)
ability to donate electron
b)
tendency to lose electron
c)
tendency to lose electron to its neighbor
d)
tendency of atom to attract shared electron to itself
3.
Polarity of a molecule is determined by
a)
shape and charge
b)
shape and difference in EN value
c)
difference in EN value and size
d)
difference in EN value and charges
4.
H2O is polar. Which statement is FALSE?
a)
Dipole moment is formed
b)
Partial separation of charges
c)
Net dipole moment
d)
Dipole moment cancel out each other
5.
CCl4 has polar bonds but is a non polar molecule. Why?
a)
bond polarity exist between atoms
b)
bond polarity between atoms cancel
c)
dipole moment exist between atoms in molecule
d)
difference in EN between C and Cl
6.
HCCl3 is a polar molecule with polar bonds. Why?
a)
it has an asymmetrical shape
b)
bond polarity between atoms cancel
c)
net dipole moment exist between atoms in molecule
d)
difference in EN between C and Cl
7.
CO2 has polar bonds but is a NON POLAR molecule. Why?
a)
it has an asymmetrical shape
b)
bond polarity between C and O atoms cancel
c)
net dipole moment exist between atoms in molecule
d)
bond polarity exist between C+ and O-
8.
Which of the following is FALSE about intermolecular forces between molecules?
a)
It is also called London or Van Der Waals forces
b)
Dipole dipole attraction between molecule
c)
Also due to instantaneous dipole attraction between molecule
d)
Must have permanent dipole moment before it can exist
9.
Factors affecting the strength of VDF and boiling point are
a)
size and charge of molecules
b)
shape and molar mass of molecule
c)
shape and surface area of molecule
d)
shape and polarity of molecule
10.
The following statement is true for hydrogen bonding EXCEPT
a)
It is a dipole dipole forces of attraction
b)
Electronegative element like N, O and F must be present
c)
Hydogen bonding is stronger than covalent bonding
d)
ESF attraction bet H atom with lone pair electron from N,O,F
11.
The following are requirement for hydrogen bonding EXCEPT
a)
H atom bonded to electronegative N, O and F
b)
Electronegative element like N, O and F must be present
c)
H atom bonded with lone pair electrons from Gp 7
d)
ESF attraction between H atom with lone pair electron from N,O,F
12.
Arrange the boiling point of molecules (RMM given), from lowest to highest.
a)
lowest H2 - N2 - H2O - CI2 highest
b)
lowest H2 - H2O - N2 - CI2 highest
c)
lowest H2 - N2 - CI2 - H2O highest
d)
lowest H2O - N2 - H2 - CI2 highest
13.
Arrange the boiling point for molecules (RMM given) from lowest to highest.
a)
lowest HCI - HBr - HI- HF highest
b)
lowest HF - HCI - HBr - HI highest
c)
lowest HF - HBr - HCI - HI highest
d)
lowest HCI - HF - HBr - HI highest
14.
Arrange the boiling point for molecules (RMM given) from lowest to highest.
a)
lowest A - B - C- D highest
b)
lowest A - C - B - D highest
c)
lowest D - A - B - C highest
d)
lowest D - A - C - B highest
15.
Why BCI3 is non polar while NCI3 is polar?
a)
BCI3 is symmetrical and bond polarity exist
b)
BCI3 does not have polar bonds, while NCI3 does
c)
BCI3 is asymmetrical and bond polarity exist
d)
BCI3 is symmetrical and bond polarity cancel
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