Determining structures from analytical data Quiz
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5 questions, one answer each
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1. Combustion of 0.0100 mol of a hydrocarbon gives 0.0300 mol CO₂ and 0.0400 mol H₂O. What is the molecular formula?
- A. C₃H₈
- B. C₃H₄
- C. C₄H₃
- D. C₃H₆
2. An organic compound shows M and M+2 peaks of equal height. What does this show?
- A. One chlorine atom
- B. One bromine atom
- C. Two carbon atoms
- D. A carbonyl group
3. In the proton NMR of a compound a quartet and a triplet appear. What does this suggest?
- A. Two CH₃ groups
- B. A CH₃CO group
- C. A CH₃CH₂ group
- D. A (CH₃)₂CH group
4. An IR spectrum has a strong absorption at 1715 cm⁻¹ and no broad absorption above 2500 cm⁻¹. Which compound fits?
- A. Butanoic acid
- B. Butan-1-ol
- C. Butanone
- D. But-1-ene
5. How many peaks does the ¹³C NMR of 2-methylpropan-2-ol, (CH₃)₃COH, show?
- A. One
- B. Three
- C. Four
- D. Two