SolidsProperties of Ionic Solids1916Choose the best answerIonic solids are brittle because:AThey contain free electronsBDisplacement of ionic layers brings like charges together, causing repulsionCThey have very low melting pointsDTheir ions are neutral Like 0 Discuss 0Share
BUMHS MDCAT 2025 Chemistry#Percentage Yield#Stoichiometry1917Choose the best answerA student expects a theoretical yield of 28 g. After isolating and drying the sample, its mass is 18 g. Later, 4 g of this mass is found to be impurity. What are the actual yield and percentage yield?A14 g and 50%B18 g and 75%C28 g and 85%D24 g and 90% Like 0 Discuss 0Share
Alcohols and PhenolsNucleophilic Substitution of Alcohols1918Choose the best answerEthanol + HBr → Bromoethane + H₂O is classified as:AAdditionBEliminationCNucleophilic substitutionDOxidation Like 0 Discuss 0Share
Carboxylic AcidsReduction of Esters1919Choose the best answerReduction of an ester with LiAlH₄ followed by hydrolysis generally produces:ATwo alcohol productsBTwo aldehydesCOne carboxylic acid and one alcoholDTwo carboxylic acids Like 0 Discuss 0Share
MDCAT Chemistry Past Paper 2023#Electrochemistry#Oxidation Number1920Choose the best answerWhat is the oxidation number of Mn in K₂MnO₄? (MDCAT 2023)A+2B+4C+6D+7 Like 0 Discuss 0Share