DP Chemistry (first assessment 2025)
Question 19M.1A.SL.TZ2.37
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.1A.SL.TZ2.37 |
| Level | SL | Paper | 1A | Time zone | TZ2 |
| Command term | Question number | 37 | Adapted from | N/A |
37.
[Maximum mark: 1]
19M.1A.SL.TZ2.37
Which class of compound is formed when a ketone is reduced?
A. primary alcohol
B. secondary alcohol
C. ether
D. carboxylic acid
[1]
Markscheme
B
Examiners report
85 % of the candidates identified the secondary alcohol as the product of the reduction of a ketone. The other three distractors (primary alcohol, ether and carboxylic acid) were chosen almost equally by the remaining candidates.
Syllabus sections
Reactivity 3. What are the mechanisms of chemical change? » Reactivity 3.2—Electron transfer reactions » Reactivity 3.2.9—Functional groups in organic compounds may undergo oxidation. Deduce equations to show changes in the functional groups during oxidation of primary and secondary alcohols, including the two-step reaction in the oxidation of primary alcohols.