Nomenclature of Carbon Compounds - UNSOLVED PRACTICE SET
Chapter: Carbon and Its Compounds | Topic: Nomenclature of Carbon Compounds
NOMENCLATURE OF CARBON COMPOUNDS - UNSOLVED PRACTICE SET
Topic: Nomenclature of Carbon Compounds
Multiple Choice Questions
Q1. The IUPAC name of CH₃—CH₂—CH₂—CH₃ is:
- Methane
- Methane
- Butane
- Pentane
Q2. The IUPAC name of CH₃—OH is:
- Methanal
- Methanol
- Methanoic acid
- Methanone
Q3. Which of the following represents propanone?
- CH₃—CHO
- CH₃—CO—CH₃
- CH₃—CH₂—OH
- CH₃—COOH
Q4. The functional group —COOH is named as:
- Aldehyde
- Ketone
- Carboxylic acid
- Alcohol
Q5. The compound CH₃—CH₂—CH₂—Cl is named as:
- Chloromethane
- Chloroethane
- 1-Chloropropane
- 2-Chloropropane
Q6. In the IUPAC system, the suffix '-ol' indicates the presence of:
- Aldehyde group
- Alcohol group
- Carboxylic acid group
- Ketone group
Short Answer Questions
Q7. Write the IUPAC names of the following compounds:
(a) CH₃—CH₂—CH₂—CH₂—OH
(b) CH₃—CH₂—CHO
Q8. Draw the structural formula of:
(a) Ethanal
(b) Propanoic acid
Q9. What is the difference between the prefixes 'meth-' and 'eth-' in IUPAC nomenclature? Give one example of each.
Q10. Write the IUPAC name and structural formula of the first member of the aldehyde series.
Q11. Your chemistry teacher writes "C₂H₅OH" on the board and asks for its common name and IUPAC name. What would you answer? Why is it important to learn both names?
Q12. Identify and name the functional groups present in:
(a) Vinegar
(b) Nail polish remover (acetone)
Long Answer Questions
Q13. Explain the basic rules of IUPAC nomenclature for carbon compounds. Illustrate with the naming of CH₃—CH₂—CH₂—OH and CH₃—CO—CH₃.
Q14. Write the structural formulae and IUPAC names of the first four members of the following homologous series:
(a) Alkanes
(b) Alcohols
Q15. During a class activity, your teacher gives you cards with the following formulae: HCHO, CH₃CHO, C₂H₅OH, CH₃COOH, and CH₃COCH₃.
(a) Arrange these in order of increasing number of carbon atoms.
(b) Write the IUPAC name of each compound.
(c) Identify which compounds belong to the same homologous series.
Numerical / Application-Based Problems
Q16. A compound has the molecular formula C₃H₆O.
(a) Draw two possible structural isomers of this compound.
(b) Write the IUPAC name of each isomer.
(c) Identify the functional group in each isomer.
Q17. A student is given the task of naming an organic compound with the following structure: CH₃—CH(Cl)—CH₂—CH₃
(a) Identify the longest carbon chain.
(b) Number the carbon atoms correctly to give the lowest number to the substituent.
(c) Write the correct IUPAC name of the compound.
Q18. In a chemistry quiz, you are asked to match the following compounds with their correct IUPAC names:
Table
Compound IUPAC Name
CH₃—O—CH₃ (i) Propanone
CH₃—CO—CH₃ (ii) Methoxymethane
CH₃—CH₂—COOH (iii) Ethanoic acid
CH₃—COOH (iv) Propanoic acid
(a) Match each compound with its correct IUPAC name.
(b) Identify the functional group present in each compound.
(c) Which of these compounds would turn blue litmus red? Explain.