GasesCompressibility Factor and Positive Deviation1101Choose the best answerPositive deviation from ideal behaviour, Z > 1, is mainly associated with:ADominant attractive forcesBMolecular-volume and repulsive effectsCZero molecular volumeDComplete absence of collisions Like 0 Discuss 0Share
Aldehydes and KetonesFactors Affecting Carbonyl Electrophilicity1102Choose the best answerWhich substituent increases the positive character of a carbonyl carbon through an electron-withdrawing inductive effect?A–CH₃B–OCH₃C–NH₂D–Cl Like 0 Discuss 0Share
StoichiometryMass–Volume Stoichiometry1103Choose the best answerOne gram of carbon is completely burnt in excess O₂: C + O₂ → CO₂ What volume of CO₂ is produced at STP (273 K and 1 atm)?A1 dm³B22.4 dm³C12 × 22.4 dm³D22.4/12 dm³ Like 0 Discuss 0Share
Periodic TableIsoelectronic Species and Ionic Radius1104Choose the best answerAr, K⁺ and Ca²⁺ are isoelectronic. Their radii increase in the order:AAr < K⁺ < Ca²⁺BCa²⁺ < Ar < K⁺CCa²⁺ < K⁺ < ArDK⁺ < Ar < Ca²⁺ Like 0 Discuss 0Share
BUMHS MDCAT 2025 Chemistry#Aldehydes and Ketones#Carbonyl Compounds1105Choose the best answerKetones when treated with LiAlH₄ in the presence of dry ether, they are converted to: (BUMHS MDCAT 2025)APrimary AlcoholBMonohyderic alcoholCSecondary alcoholDDihyderic alcohol Like 0 Discuss 0Share