CHEM 2 REVIEW (Polarity, IMF)

What bond is characterized by unequal sharing of electrons between 2 atoms?

• Non-Polar Bond

• Polar Bond

• Metallic Bond

• Ionic Bond

Answer explanation

A Polar Bond is characterized by unequal sharing of electrons between 2 atoms, making it the correct choice.

Which is TRUE about the molecule of CCl₄?

• CCl₄ does not have a net dipole.

• CCl₄ does not have any polar bonds.

• CCl₄ is overall a polar molecule. 

• CCl₄ is an asymmetrical molecule.

Answer explanation

CCl4 does not have a net dipole because the polar bonds cancel each other out due to the symmetrical tetrahedral shape of the molecule.

Which is TRUE about the molecular shape and polarity of CH₃Cl?

• Tetrahedral, Non-Polar

• Trigonal Pyramidal, Polar

• Trigonal Pyramidal, Non-Polar

• Tetrahedral, Polar

Answer explanation

The correct molecular shape of CH3Cl is tetrahedral due to the central carbon atom being surrounded by four other atoms. The molecule is polar because of the difference in electronegativity between carbon and chlorine.

Which among the following functional groups serves as flavoring agent and gives of fruity smells?

• amine

• aldehyde

• ester

• ether

Answer explanation

Esters are functional groups that serve as flavoring agents and give off fruity smells, making them the correct choice in this question.

Which among the following is a polar compound?

• NF₃

• C₂H₆

• BF₃

• BCl₃

Answer explanation

NF3 is a polar compound due to the electronegativity difference between nitrogen and fluorine, creating a dipole moment.

Which is TRUE about the molecular shape and polarity of CH₃F?

• Tetrahedral, Non-Polar              

• Tetrahedral, Polar

• Trigonal Pyramidal, Polar

• Trigonal Pyramidal, Non-Polar

Answer explanation

The correct choice is Tetrahedral, Polar because the CH3F molecule has a tetrahedral shape with a lone pair on the central atom, making it polar.

What is the molecular geometry of NH₃?

• tetrahedral

• seesaw

• octahedral

• trigonal pyramidal

Answer explanation

NH3 has a trigonal pyramidal molecular geometry due to its three bonding pairs and one lone pair of electrons, resulting in a pyramid shape.

Which among the following functional groups is utilized as a freon?

• alkyl halide       

• ester

• amine

• aldehyde

Answer explanation

Freon is a type of alkyl halide, making it the functional group utilized in this case.

Which among the following has the strongest IMFA?

• I₂

• HF

• CH₃Cl

• C₄H₁₀

Answer explanation

I2 has the strongest IMFA due to the presence of iodine atoms, which have a larger atomic radius and more polarizability compared to the other choices.

What intermolecular forces of attraction are present between amine functional groups?

• Dipole-Dipole and London Dispersion Forces

• Hydrogen Bonding and London Dispersion Forces

• Dipole-Dipole, Hydrogen Bonding, and London Dispersion Forces

• Ion-Dipole, Dipole-Dipole, Hydrogen Bonding, and London Dispersion Forces

Answer explanation

Amine functional groups exhibit Dipole-Dipole, Hydrogen Bonding, and London Dispersion Forces as intermolecular attractions.