AQA · Chemistry · 8462
GCSE Chemistry (AQA): Hydrocarbons
Topic 6 — The Rate & Extent of Chemical Change. Generated from the caption track of Cognito's lesson video "GCSE Chemistry - Hydrocarbons - Alkanes & Homologous Series (2027/28 exams)"; each card deep-links to the moment in the video it came from. Lesson 7.04 of Cognito's AQA GCSE Combined Science (Trilogy) and Chemistry course (Higher tier), filed under AQA Chemistry 8462. Teaching by Cognito — https://cognitoedu.org/coursesubtopic/c2-gcse-aqa-h-c_7.04.
13 flashcards · Free to study · No account needed
Study this deck
Preparing your cards…
All questions and answers
Read through the full deck, or practise recalling each answer above.
Define a hydrocarbon.
Show answer
A compound formed from carbon and hydrogen only.
What is the molecular formula of propane?
Show answer
C₃H₈.
What is organic chemistry the study of?
Show answer
Compounds that contain carbon.
How many bonds does each carbon atom form?
Show answer
Four strong covalent bonds.
What is the molecular formula of ethane?
Show answer
C₂H₆.
What is the molecular formula of butane?
Show answer
C₄H₁₀.
What is the general formula for alkanes?
Show answer
CnH2n+2.
What is the molecular formula of methane?
Show answer
CH₄ — one carbon bonded to four hydrogens.
Why is butanol not classed as a hydrocarbon?
Show answer
It also contains an oxygen atom, and hydrocarbons contain only carbon and hydrogen.
What is the molecular formula of octane, an alkane with 8 carbons?
Show answer
C₈H₁₈, since 2 × 8 + 2 = 18 hydrogens.
What is a homologous series?
Show answer
A group of organic compounds with the same general formula, similar chemical properties, and each member differing by CH₂.
Alkanes are ? compounds, because every carbon has four single covalent bonds and no double bonds.
Show answer
saturated
What class of hydrocarbon is formed when an alkane gains a carbon–carbon double bond?
Show answer
An alkene — the two carbons involved each lose a hydrogen.
Want to create your own cards? Create a free account. AI generation uses credits.