SCH4U PRACTICE PAPER 2026 COMPLETE
QUESTIONS AND SOLUTIONS GRADED A+
● 2 main classes of hydrocarbons. Answer: aliphatic and aromatic
● 4 families of aliphatics. Answer: Alkanes
Alkenes
Alkynes
Cyclic
● First 10 alkanes. Answer: Methane
Ethane
Propane
Butane
Pentane
Hexane
Heptane
Octane
Nonane
Decane
● Formula of alkanes. Answer: CnH2n+2
, ● Substituent. Answer: branched alkanes with -yl suffix
● Alkyl groups have __________ than alkane groups. Answer: 1 less
hydrogen
● Does Methane or decane have a higher melting point?. Answer:
decane
● Are alkanes saturated or unsaturated?. Answer: saturated
● Alkene group. Answer: hydrocarbons that have one or more double
bonds
● Alkene formula. Answer: CnH2n
● How many sigma and pi bonds are in alkenes?. Answer: 1 sigma and 1
pi bond
● Alkyne Group. Answer: contain one or more TRIPLE bond
● Alkyne formula. Answer: CnH2n-2
QUESTIONS AND SOLUTIONS GRADED A+
● 2 main classes of hydrocarbons. Answer: aliphatic and aromatic
● 4 families of aliphatics. Answer: Alkanes
Alkenes
Alkynes
Cyclic
● First 10 alkanes. Answer: Methane
Ethane
Propane
Butane
Pentane
Hexane
Heptane
Octane
Nonane
Decane
● Formula of alkanes. Answer: CnH2n+2
, ● Substituent. Answer: branched alkanes with -yl suffix
● Alkyl groups have __________ than alkane groups. Answer: 1 less
hydrogen
● Does Methane or decane have a higher melting point?. Answer:
decane
● Are alkanes saturated or unsaturated?. Answer: saturated
● Alkene group. Answer: hydrocarbons that have one or more double
bonds
● Alkene formula. Answer: CnH2n
● How many sigma and pi bonds are in alkenes?. Answer: 1 sigma and 1
pi bond
● Alkyne Group. Answer: contain one or more TRIPLE bond
● Alkyne formula. Answer: CnH2n-2