Organic Chemistry Unit Grade 12 Chemistry Exam Questions and Answers.

Organic Chemistry Unit Grade
12 Chemistry Exam Questions
and Answers
Alkanes - Correct Answers: suffix "ane"

single bonded hydrocarbons

saturated

non-polar

london forces



Alkenes - Correct Answers: suffix "ene"

at least one double bond

unsaturated

non-polar

london forces



Alkynes - Correct Answers: suffix "yne"

at least one triple bond

unsaturated

non-polar

london forces



Cylic hydrocarbons - Correct Answers: prefix "cyclo"

hydrocarbons that form rings

alkanes, alkenes, alkynes



Aromatic hydrocarbons - Correct Answers: suffix "benzene" if it is the root

prefix "phenyl" if it is a branch

, benzene rings



Special branch names - Correct Answers: Isobutyl (CH2 bonded to CH with two CH3 bonded to it)

Isopropyl (CH with two CH3 bonded to it)

Ortho (CH3 bonded to the 1st and 2nd carbons on a benzene ring)

Meta (CH3 bonded to the 1st and 3rd carbons on a benzene ring)

Para (CH3 bonded to the 1st and 4th carbons on a benzene ring)



Organic Halides - Correct Answers: halogens as branches

F - fluro, Cl - chloro, Br - bromo, I - iodo

polar

london forces, dipole dipole



Alcohols - Correct Answers: OH anywhere in the chain

suffix "ol"

polar, long chains can be non-polar

london, dipole dipole, hydrogen

reactions - hydration, dehydration, combustion



Ethers - Correct Answers: O in the middle of the chain

add "oxy" to the prefix of the smaller hydrocarbon

polar

london, dipole dipole

reaction - condensation



Aldehydes - - Correct Answers: double bonded O at the end

suffix "al"

very polar

london, dipole dipole