Basic Concepts of ChemistryMatter and its Classification2636Choose the best answerWhich type of matter can have variable composition?AA pure substanceBAn elementCBoth homogeneous and heterogeneous mixturesDA compound Like 0 Discuss 0Share
Chemistry of HydrocarbonsHalogenation of Benzene2637Choose the best answerIn the simplified mechanism of benzene chlorination, the reactive electrophilic chlorine species is represented as:ACl⁺BCl⁻CCl₂DCl₂⁻ Like 1 Discuss 0Share
Chemical BondingCoordinate Covalent Bonding2638Choose the best answerWhich compound contains ionic and covalent bonding, with formation of one N–H bond describable as coordinate covalent?ANH₄ClBNaClCHClDAlCl₃ Like 0 Discuss 0Share
MDCAT Chemistry Past Papers Reconduct 2023#Limiting Reagent#Stoichiometry2639Choose the best answerIn a chemical reaction, which characteristic defines the limiting reactant? (MDCAT Reconduct 2023)AProduces the maximum number of moles of productsBIs in excessCProduces the minimum number of moles of productsDReacts partially Like 0 Discuss 0Share
Alkyl HalidesGrignard Reaction with Esters2640Choose the best answerA formate ester, HCOOR, reacts with excess Grignard reagent followed by acidic hydrolysis to produce mainly:APrimary alcoholBSecondary alcoholCTertiary alcoholDCarboxylic acid Like 0 Discuss 0Share