PORTAGE CHEM 219
MODULE 2 EXAM QUESTIONS AND
CORRECT ANSWERS
LATEST UPDATE 2026/2027 .
, 1. list prefixes for first 10 carbons in order: meth, eth, prop, but, pent, hex, hept, oct, non, dec
2. hydrocarbon: compounds composed of only carbon and hydrogen
3. parent chain: longest continuous chain of carbon atoms
4. substituent: heteroatom or group of atoms that are attached to the parent chain
5. numerical prefixes for # of identical substituent groups (2-10 in order): di, tri, tetra, penta, hexa, hepta, octa, nona, deca
6. alkane (with formula) ✔✔ ANSW hydrocarbon containing only single bonds between carbons, CnH2n+2
7. rules for naming alkanes ✔✔ ANSW 1. longest continues chain is parent chain
2. number parent chain starting with the end closest to the first branch
3. name using IUPAC rules for substituents
8. IUPAC systematic name order for alkanes ✔✔ ANSW locant-(prefix)SubstituentParent
9. in numbering parent chains, if there are two equally long chains... ✔✔ ANSW select the chain with the most branches
coming ott
10. in numbering parent chains, if the first branch point if the same distance from either end of the parent chain... ✔✔
ANSW choose the numbering that gives the lower numbers to the most substituents
11. in numbering parent chains, if there are only 2 substituents and both are equidistant from opposite ends of the parens
chain... ✔✔ ANSW choose the numbering direction so the substituent with the higher alphabetical priority gets the lower locant number
12. solubility and density properties of alkanes ✔✔ ANSW NOT soluble in water, low density (< 1g/ml) so floats on top of water
13. melting and boiling points properties of alkanes ✔✔ ANSW LOW MPs and BPs due to weak attractive forces between
molecules
14. how does branching affect MPs and BPs ✔✔ ANSW branching lowers surface area of the molecule, which in turn lowers VDWFs and
thus lowering BPs and MPs
15. conformers ✔✔ ANSW ditterent shapes of molecules derived from rotations of single bonds
MODULE 2 EXAM QUESTIONS AND
CORRECT ANSWERS
LATEST UPDATE 2026/2027 .
, 1. list prefixes for first 10 carbons in order: meth, eth, prop, but, pent, hex, hept, oct, non, dec
2. hydrocarbon: compounds composed of only carbon and hydrogen
3. parent chain: longest continuous chain of carbon atoms
4. substituent: heteroatom or group of atoms that are attached to the parent chain
5. numerical prefixes for # of identical substituent groups (2-10 in order): di, tri, tetra, penta, hexa, hepta, octa, nona, deca
6. alkane (with formula) ✔✔ ANSW hydrocarbon containing only single bonds between carbons, CnH2n+2
7. rules for naming alkanes ✔✔ ANSW 1. longest continues chain is parent chain
2. number parent chain starting with the end closest to the first branch
3. name using IUPAC rules for substituents
8. IUPAC systematic name order for alkanes ✔✔ ANSW locant-(prefix)SubstituentParent
9. in numbering parent chains, if there are two equally long chains... ✔✔ ANSW select the chain with the most branches
coming ott
10. in numbering parent chains, if the first branch point if the same distance from either end of the parent chain... ✔✔
ANSW choose the numbering that gives the lower numbers to the most substituents
11. in numbering parent chains, if there are only 2 substituents and both are equidistant from opposite ends of the parens
chain... ✔✔ ANSW choose the numbering direction so the substituent with the higher alphabetical priority gets the lower locant number
12. solubility and density properties of alkanes ✔✔ ANSW NOT soluble in water, low density (< 1g/ml) so floats on top of water
13. melting and boiling points properties of alkanes ✔✔ ANSW LOW MPs and BPs due to weak attractive forces between
molecules
14. how does branching affect MPs and BPs ✔✔ ANSW branching lowers surface area of the molecule, which in turn lowers VDWFs and
thus lowering BPs and MPs
15. conformers ✔✔ ANSW ditterent shapes of molecules derived from rotations of single bonds
