Atomic StructureIsoelectronic Species126Choose the best answerWhich pair is isoelectronic?ACO₂ and NO₂BNO₂⁻ and CO₂CCN⁻ and CODSO₂ and CO₂ Like 0 Discuss 0Share
MDCAT Chemistry Paper 2025#Limiting Reagent#Stoichiometry127Choose the best answer50g of Mg is burnt with 32g of oxygen to form MgO, amount of excess reagent left is? (IBA MDCAT 2025)A6g MgB2g MgC8g O₂D16g O₂ Like 0 Discuss 0Share
XIIMDCAT Chemistry Test#Macromolecules#Polymers128Choose the best answerWhich pair consists entirely of condensation polymers?APVC and PANBNylon and PVACBakelite and TeryleneDPE and PP Like 0 Discuss 0Share
Fundamental Principles of Organic ChemistrySources of Aromatic Compounds129Choose the best answerWhich pair is an important source of aromatic compounds?ACoal and natural gasBCoke and coal gasCMarsh gas and water gasDCoal tar and petroleum Like 0 Discuss 0Share
Aldehydes and KetonesAldol Condensation130Choose the best answerAldol condensation occurs in aldehydes or ketones containing:AOnly a carbonyl groupBAt least one α-hydrogen atomCA phenyl groupDTwo carbonyl groups Like 0 Discuss 0Share