BCH 351 EXAM 1 UPDATED ACTUAL QUESTIONS AND
CORRECT ANSWERS
Question:
1. Hydrocarbons are ...
Answer:
nonpolar, hydrophobic
Question:
2. 5 Functional Groups
Answer:
amino, hydroxyl, sulfhydryl, phosphoryl, carboxyl, methyl
Question:
3. Amines
Answer:
nitrogen joined to at lesat one alkyl group
Question:
4. amide
Answer:
have a carbonyl group between the nitrogen and R group
Question:
5. functional group characteristics
Answer:
- contain electronegative atoms (O,N,S)
- usually electrically charged or polar
- make organic molecule amphiphathic
- create multifunctional molecules that increase functional diversity
- provide sights for intra and inter molecular interactions such as hydrogen
bonding and ionic interactions
,Question:
6. types of chemical interactions
Answer:
covalent, ionic, hydrogen bonds, van der Waal, hydrophobic effects
Question:
7. covalent bonds
Answer:
formed by atoms sharing valence electrons and fill each atoms outer shell.
can be polar or nonpolar depending on if atoms are shared equally or not
Question:
8. polar covalent bond
Answer:
electrons are shared unequally. electronegativity >0.5
Question:
9. nonpolar covalent bond
Answer:
electrons are shared equally. electronegativity <0.5
Question:
10. common polar covalent bonds
Answer:
C-O, O-H, N-H
, Question:
11. ionic interactions
Answer:
also called charge-charge interactions or salt bridges. Occur betwen opposite
charged atoms or groups. Ex: Na+ and Cl-.
Electronegativity >2.0 (usually between most and least electronegative)
Question:
12. hydrogen bonds
Answer:
form when a hydrogen that is covalently bonded to an electronegative atom is in
proximity to another electronegative atom. Partial charges
Question:
13. strong hydrogen bond
Answer:
linear
Question:
14. weak hydrogen bond
Answer:
angled
CORRECT ANSWERS
Question:
1. Hydrocarbons are ...
Answer:
nonpolar, hydrophobic
Question:
2. 5 Functional Groups
Answer:
amino, hydroxyl, sulfhydryl, phosphoryl, carboxyl, methyl
Question:
3. Amines
Answer:
nitrogen joined to at lesat one alkyl group
Question:
4. amide
Answer:
have a carbonyl group between the nitrogen and R group
Question:
5. functional group characteristics
Answer:
- contain electronegative atoms (O,N,S)
- usually electrically charged or polar
- make organic molecule amphiphathic
- create multifunctional molecules that increase functional diversity
- provide sights for intra and inter molecular interactions such as hydrogen
bonding and ionic interactions
,Question:
6. types of chemical interactions
Answer:
covalent, ionic, hydrogen bonds, van der Waal, hydrophobic effects
Question:
7. covalent bonds
Answer:
formed by atoms sharing valence electrons and fill each atoms outer shell.
can be polar or nonpolar depending on if atoms are shared equally or not
Question:
8. polar covalent bond
Answer:
electrons are shared unequally. electronegativity >0.5
Question:
9. nonpolar covalent bond
Answer:
electrons are shared equally. electronegativity <0.5
Question:
10. common polar covalent bonds
Answer:
C-O, O-H, N-H
, Question:
11. ionic interactions
Answer:
also called charge-charge interactions or salt bridges. Occur betwen opposite
charged atoms or groups. Ex: Na+ and Cl-.
Electronegativity >2.0 (usually between most and least electronegative)
Question:
12. hydrogen bonds
Answer:
form when a hydrogen that is covalently bonded to an electronegative atom is in
proximity to another electronegative atom. Partial charges
Question:
13. strong hydrogen bond
Answer:
linear
Question:
14. weak hydrogen bond
Answer:
angled
