Chemistry for Biology 

1. Why can H-bonding only occur in polar covalent molecules?​

      a. It is the result of both inter and intramolecular electronegative attraction.

      b. Polar covalent molecules accept H-bonds better than non-polar covalent molecules

      c. H-bonds don't actually occurs in polar-covalent molecules.

      d. H-bonds are only in non-polar covalent molecules.

 

2. Explain the role of electronegativity in covalent bonding.

      a. A large electronegativity difference forces the atoms within the molecule to break apart.

      b. Electronegativity has no role in covalent bonding.

      c. Electronegativity difference between atoms determines the type of covalent bond.

      d. Electronegativity determines if the bond is ionic.

 

3. True or False? NH3 is non-polar covalent.

      a. True

      b. False

 

4. Define intermolecular and intramolecular bonds.

      a. Intermolecular: bonds between molecules; Intramolecular: bonds within molecules.

      b. Intramolecular: bonds between molecules; Intermolecular: bonds within molecules.

      c. Intermoelcular: bonds around a molecular; Intramolecular: Do not exist.

      d. Intermolecular and intramolecular bonds are the same thing.

 

5. True or false? Electronegativity determines pH.

      a. True

      b. False