SCH4U FINAL REVIEW SCRIPT 2026 TESTED
ANSWERS GRADED A+
● What are hydrocarbons? Answer: Compounds that contain only
HYDROGEN and CARBON atoms in its molecular structure.
● What are the three groups of hydrocarbons? Answer: 1. Alkane 2.
Alkene 3. Alkyne
● 1. Alkane 2. Alkene 3. Alkyne Answer: hydrocarbons with single
bonds between carbons
● what are alkenes? Answer: hydrocarbons with double bonds between
carbons
● what are alkynes? Answer: hydrocarbons with triple bonds between
carbons
● what are three FORMS of hydrocarbons? Answer: 1. chains 2. rings 3.
special rings (benzene)
● what is an aromatic substance? Answer: an aromatic substance is any
substance containing a ring. all benzenes are aromatic.
,● what are the prefixes from 1-10 when naming hydrocarbons? Answer:
1. meth
2. eth
3. prop
4. but
5. pent
6. hex
7. hept
8. oct
9. non
10. dec
● what are the three endings when naming hydrocarbons, and what is
each ending for? Answer: 1. ane (single carbon bonds)
2. ene (double carbon bonds)
3. yne (triple carbon bonds)
● what is a 'cis' molecule? Answer: a molecule with a double bond,
where the atoms connected are both facing/pointed in the same direction.
, ● what is a 'trans' molecule Answer: a molecule with a double bond,
where the atoms connected are both facing/pointed in the opposite
direction.
● what is an isomer? Answer: a group of compounds that have the same
molecular formula but are arranged differently in order or 3D space.
● what is a saturated molecule? Answer: carbon chains with no more
spots (No double/triple bonds) to add hydrogen (saturated with
hydrogens)
● what is an unsaturated molecule? Answer: carbon chains with double
and triple bonds
● saturated & unsaturated substances: which has a higher melting point?
which is healthier for you? Answer: saturated substances have higher
melting points, but are not good for you, as your body has a hard time
metabolizing them. unsaturated substances have lower melting points,
and are healthier for you, since your body breaks double/triple bonds
easily.
● what is a poly-unsaturated substance? Answer: a substance with
multiple double or triple bonds (most healthy)
● what is an alcohol? Answer: an organic compounds that contains a
hydroxyl ( R-OH) group
ANSWERS GRADED A+
● What are hydrocarbons? Answer: Compounds that contain only
HYDROGEN and CARBON atoms in its molecular structure.
● What are the three groups of hydrocarbons? Answer: 1. Alkane 2.
Alkene 3. Alkyne
● 1. Alkane 2. Alkene 3. Alkyne Answer: hydrocarbons with single
bonds between carbons
● what are alkenes? Answer: hydrocarbons with double bonds between
carbons
● what are alkynes? Answer: hydrocarbons with triple bonds between
carbons
● what are three FORMS of hydrocarbons? Answer: 1. chains 2. rings 3.
special rings (benzene)
● what is an aromatic substance? Answer: an aromatic substance is any
substance containing a ring. all benzenes are aromatic.
,● what are the prefixes from 1-10 when naming hydrocarbons? Answer:
1. meth
2. eth
3. prop
4. but
5. pent
6. hex
7. hept
8. oct
9. non
10. dec
● what are the three endings when naming hydrocarbons, and what is
each ending for? Answer: 1. ane (single carbon bonds)
2. ene (double carbon bonds)
3. yne (triple carbon bonds)
● what is a 'cis' molecule? Answer: a molecule with a double bond,
where the atoms connected are both facing/pointed in the same direction.
, ● what is a 'trans' molecule Answer: a molecule with a double bond,
where the atoms connected are both facing/pointed in the opposite
direction.
● what is an isomer? Answer: a group of compounds that have the same
molecular formula but are arranged differently in order or 3D space.
● what is a saturated molecule? Answer: carbon chains with no more
spots (No double/triple bonds) to add hydrogen (saturated with
hydrogens)
● what is an unsaturated molecule? Answer: carbon chains with double
and triple bonds
● saturated & unsaturated substances: which has a higher melting point?
which is healthier for you? Answer: saturated substances have higher
melting points, but are not good for you, as your body has a hard time
metabolizing them. unsaturated substances have lower melting points,
and are healthier for you, since your body breaks double/triple bonds
easily.
● what is a poly-unsaturated substance? Answer: a substance with
multiple double or triple bonds (most healthy)
● what is an alcohol? Answer: an organic compounds that contains a
hydroxyl ( R-OH) group
