Organic basics
15 review questions with answers for Organic basics. Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
Compounds whose molecules contain only C and H atoms?
- Carbohydrates
- HydrocarbonsRight answer
- Hydrates
- Carbonates
What this set covers
Hydrocarbons and the first ideas of organic chemistry. It covers alkanes and alkenes, formulas like CH₄ and C₃H₈, the bromine water test, fractional distillation, cracking, the –OH group in alcohols, and monomers joining into polymers.
- Common mix-up
- Students often mix up alkanes and alkenes: alkenes contain a C=C double bond, which is why they decolorize bromine water and alkanes do not.
- Review tip
- Write the formulas of methane, ethane and propane in a row, spot the pattern, then explain in two sentences how fractional distillation sorts long and short chains.
All 15 questions and answers
Compounds whose molecules contain only C and H atoms?
Answer: Hydrocarbons
Saturated hydrocarbons with only single C–C bonds?
Answer: Alkanes
Hydrocarbons containing a C=C double bond?
Answer: Alkenes
Formula of methane?
Answer: CH₄
Formula of propane?
Answer: C₃H₈
Alkane with two carbon atoms?
Answer: Ethane
Colour of orange bromine water after shaking with an alkene?
Answer: Colourless
Products of the complete combustion of an alkane?
Answer: Carbon dioxide and water
Process that separates crude oil into parts with different boiling ranges?
Answer: Fractional distillation
Where fractions with the lowest boiling points collect in a fractionating column?
Answer: Top
Viscosity of long-chain hydrocarbons compared with short-chain ones?
Answer: Higher
Breaking long-chain hydrocarbons into shorter, more useful molecules?
Answer: Cracking
Functional group present in all alcohols?
Answer: –OH
Alcohol found in alcoholic drinks?
Answer: Ethanol
Small molecules that join to make a polymer?
Answer: Monomers
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options were written for that question.