Most important chemistry questions

🧪 Top 15 MCQs in Chemistry – Test Your Knowledge!

Answer all 15 multiple-choice questions on general and organic chemistry. Click on an option, and your result will appear instantly. When you finish, your total score will be shown.

1. What is the IUPAC name of CH₃–CH₂–OH?

Ethanol Methanol Ethanal Ethanoic acid

2. What prefix indicates a five-carbon chain?

Hex Pent But Dec

3. Which functional group uses the suffix “-one”?

Alcohol Carboxylic acid Ketone Aldehyde

4. How many isomers does C₄H₁₀ (butane) have?

1 2 3 4

5. Which acid is also known as acetic acid?

Methanoic acid Ethanoic acid Propanoic acid Butanoic acid

6. What is the suffix for an alkene?

-ane -yne -ene -ol

7. What is the IUPAC name of CH₃–CHO?

Ethanol Ethanal Ethanoic acid Ethane

8. Molality is defined as moles of solute per:?

Mass of solvent in kg Mass of solution in kg Volume of solution in liters Number of moles of solvent

9. What is the oxidation state of oxygen in H₂O₂ (hydrogen peroxide)?

-1 -2 0 +1

10. Which element is represented by the symbol ‘Na’?

Nitrogen Sodium Neon Nitric oxide