AQA A level Chemistry Questions and Answer (updated) 2024/2025 Grade A

Question:-What's the Test for a Carbonyl group? {{{Answer}}} (Brady's reagent (2,4 DNPH) Orange to yellow precipitate) Question:-Do Carbonyls have a lower or higher boiling point when compared to a corresponding Alcohol?{{{Answer}}} (Lower) Question:-Do Carbonyls have a higher or lower boiling point when compared to a corresponding Alkane?{{{Answer}}} (Higher) Question:-Do Carbonyls dissolve in water?{{{Answer}}} (Yes limited association with water molecules) Question:-What's the test for an Aldehyde?{ {{Answer}}} (Tollens reagent - Silver mirror test OR Fehling's/Benedict's reagent blue to brick red) Question:-What is the Test for a Ketone? {{{Answer}}} (Negative result with an oxidizing agent like Fehlings) Question:-What is the Test for a Carboxylic Acid? {{{Answer}}} (Add a carbonate - CO2 formed and effervesence OR Universal indicator - red colour) Question:-Will a Carboxylic Test positive as a Carbonyl? {{{Answer}}} (No) Question:-What is the Oxidising Agent for Alcohols? {{{Answer}}} (Acidified Potassium Dichromate (K2Cr2O7)) Question:-Oxidising Agents to change Aldehydes to Carboxylics? {{{Answer}}} (Fehlings, Acidified Potassium Dichromate, Tollens) Question:-What is the Reducing agent for Carboxylics and Carbonyls? {{{Answer}}} (NaBrH4 OR LiAlH4) Question:-Can all Alcohols be Oxidized to a Carbonyl? {{{Answer}}} (Not Tertiary) Question:-Product of Oxiding a Primary Alcohol? {{{Answer}}} (Aldehyde, Carboxylic)