The International Chemistry Quiz (ICQ) is held by the Royal Australian Chemical Institute (RACI). It is an international chemistry competition with a long history that aims to encourage students to solve real-life problems with chemistry knowledge, attracting candidates from 21 regions annually. In the 2025 quiz, Sun Kei students had an outstanding performance, with 4 students receiving the Certificate of High Distinction and 6 students receiving the Certificate of Distinction. The awardees are as follows:
| Class | Name | Award |
| 5M | FAN Ho-yiu | Certificate of High Distinction |
| LAU Ho-yi | Certificate of High Distinction | |
| LEUNG Wai-him | Certificate of High Distinction | |
| 5M | KWOK Sum-nin Sammy | Certificate of High Distinction |
| 4R | CHEN Jingxuan | Certificate of Distinction |
| 4M | LEUNG Tai-ming | Certificate of Distinction |
| 6M | HUI Man-kit | Certificate of Distinction |
| LEUNG Ho-long Ryan | Certificate of Distinction | |
| LIN Yik-hang | Certificate of Distinction | |
| POON Sze-kit | Certificate of Distinction |
