UHS MDCAT 2023 ChemistryUHS MDCAT 2023 Past Paper#Aldehydes and Ketones#Tollens' Test1181Choose the best answerThe appearance of a silver mirror in Tollens' test indicates the presence of which of the following? (UHS MDCAT 2023)AA ketoneBAn aldehydeCAn acidDAn alcohol Like 0 Discuss 0Share
Carboxylic AcidsAcidic Character of Carboxylic Acids1182Choose the best answerWhich statement regarding carboxylic acid acidity is correct?AThe +I effect increases acidity.BElectron-withdrawing groups stabilize the carboxylate ion.CAlkyl groups increase acidity by withdrawing electrons.DResonance destabilizes the conjugate base. Like 0 Discuss 0Share
BUMHS MDCAT 2025 Chemistry#Alcohols#Alcohols and Phenols1183Choose the best answerDehydration of alcohol to form ethene is an example of: (BUMHS MDCAT 2025)Asubstitution reactionBaddition reactionCelimination reactionDredox reaction Like 0 Discuss 0Share
Chemical BondingBond Formation and Stability1184Choose the best answerAccording to the simplified octet-based bonding model, chemical bonding generally:AHelps attain stable electronic configurationBLowers the energy of the systemCIncreases stabilityDAll of these Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Pure Substances1185Choose the best answerWhich option represents a pure substance?AAirBMilkCSodium chlorideDSoil Like 0 Discuss 0Share