MDCAT Chemistry Past Paper 2023#Atomic Structure#Isoelectronic Species851Choose the best answerWhich of the following is different in Na⁺ (Z = 11), Mg²⁺ (Z = 12) and Al³⁺ (Z = 13)? (MDCAT 2023)ANumber of shellsBNumber of electronsCElectronic configurationDNumber of protons Like 0 Discuss 0Share
SolidsRadius Ratio Rule852Choose the best answerRadius ratio is mainly useful for predicting the:AColour of an ionic solidBCoordination number and geometry of an ionic crystalCMelting point of every solidDSolubility of every ionic compound Like 0 Discuss 0Share
Chemistry of HydrocarbonsFree-Radical Halogenation of Alkanes853Choose the best answerWhich reaction is a propagation step in the chlorination of methane?ACl₂ → 2Cl•BCH₄ + Cl• → CH₃• + HClCCl• + Cl• → Cl₂DCH₃• + CH₃• → C₂H₆ Like 1 Discuss 0Share
Fundamental Principles of Organic ChemistryStability of Free Radicals854Choose the best answerThe correct order of stability of simple alkyl free radicals is:ACH₃• > 1° > 2° > 3°B3° > 2° > 1° > CH₃•C2° > 3° > CH₃• > 1°D1° > CH₃• > 2° > 3° Like 0 Discuss 0Share
Carboxylic AcidsHydrolysis of Nitriles855Choose the best answerWhich compound gives propanoic acid on hydrolysis?ACH₃CH₂CNBCH₃CHOCCH₃CH₂OHDCH₃COCH₃ Like 0 Discuss 0Share