AQA- A LEVEL CHEMISTRY REVISION EXAM QUESTIONS WITH CORRECT ANSWERS PROVIDED 2025/2026 EDITION

AQA- A LEVEL CHEMISTRY REVISION EXAM QUESTIONS WITH CORRECT ANSWERS PROVIDED 2025/2026 EDITION TOF steps -1) ionisation 2) acceleration 3) ion drift 4) detection 5) analysis Electron impact -Sample vaporised and electron gun fires high energy electrons at it which knock off 1 electron from each particle, making them 1+ ions NB- can knock off more than one e or break molecular ion electrospray ionization -Sample dissolved in volatile solvent then injected through needle to give fine mist which is attached to positive end of high voltage power supply, particles gain proton NB- Mr of substance is actually one less than shown due to extra H+ Acceleration (TOF) -positive ions accelerated using electric field so they all have the same kinetic energy Ion drift (TOF) -particles with small mass have larger velocity do ions start to separate with lightest ions reaching detector first