BUMHS MDCAT 2025 Chemistry#Percentage Yield#Stoichiometry536Choose 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
Sindh MDCAT 2021 Chemistry#Alkynes#Chemistry of Hydrocarbons537Choose the best answerCalcium Carbide on hydrolysis forms:AmethaneBethaneCbenzeneDacetylene Like 0 Discuss 0Share
Industrial chemistry Industrial chemistry MCQS#Enzymes#Macromolecules538Choose the best answerIn the induced-fit model, an enzyme:AHas a completely rigid active siteBChanges its shape slightly to improve substrate bindingCPermanently changes into the productDBinds only after the reaction is complete Like 0 Discuss 0Share
Stoichiometry 11#Avogadro's Number539Choose the best answerIf one mole were defined as 6.022 × 10²⁰ particles instead of 6.022 × 10²³ particles, which quantity would change?AThe definition of mass in gramsBThe mass of one mole of carbonCThe stoichiometric ratio in a balanced equationDThe ratio of elements in a compound Like 0 Discuss 0Share
Nomenclature of Organic CompoundsNomenclature of Organic Compounds MCQs#Organic Nomenclature540Choose the best answerSelect the correct IUPAC name for CH₂=C(CH₃)CH(CH₃)CH₃.A2,3-Dimethylbut-2-eneB3-Methylpent-1-eneC2-Methylbut-2-eneD2,3-Dimethylbut-1-ene Like 0 Discuss 0Share