DP Chemistry (first assessment 2025)
Question 20N.1A.SL.TZ0.21
| Date | November 2020 | Marks available | [Maximum mark: 1] | Reference code | 20N.1A.SL.TZ0.21 |
| Level | SL | Paper | 1A | Time zone | TZ0 |
| Command term | Deduce | Question number | 21 | Adapted from | N/A |
21.
[Maximum mark: 1]
20N.1A.SL.TZ0.21
Iron is a stronger reducing agent than silver.
What is correct when this voltaic cell is in operation?
[1]
Markscheme
D
Examiners report
53% of candidates identified the anode, cathode, AND direction of electron flow in a voltaic cell, with misconceptions being equally distributed. This was answered much better by higher scoring candidates.
Syllabus sections
Reactivity 3. What are the mechanisms of chemical change? » Reactivity 3.2—Electron transfer reactions » Reactivity 3.2.6—A primary (voltaic) cell is an electrochemical cell that converts energy from spontaneous redox reactions to electrical energy. Explain the direction of electron flow from anode to cathode in the external circuit, and ion movement across the salt bridge.