LiquidsBoiling Point and External Pressure1156Choose the best answerFor pure water to boil at 110°C, the external pressure must be:ALess than 760 mmHgBGreater than 760 mmHgCExactly 760 mmHgDZero Like 0 Discuss 0Share
StoichiometryGas Volume and Number of Moles1157Choose the best answerWhich sample contains the minimum number of moles at STP (273 K and 1 atm)?A1 dm³ CH₄B5 dm³ HeC10 dm³ H₂D22.4 dm³ Cl₂ Like 0 Discuss 0Share
MDCAT Chemistry Past PapersIBA MDCAT Chemistry Paper Reconduct 2024#Aldehydes and Ketones#Cannizzaro Reaction1158Choose the best answerIn Cannizzaro's reaction, formaldehyde reacts with: (IBA MDCAT Reconduct 2024)AChloroformBNaOHCWaterDHCl Like 0 Discuss 0Share
Chemical BondingHybridization1159Choose the best answerWhich molecule contains an sp³-hybridized central atom?ACH₄BC₂H₄CCO₂DC₂H₂ Like 0 Discuss 0Share
StoichiometryMole–Mass Stoichiometry1160Choose the best answerIf 2.25 mol O₂ reacts completely with Al, what mass of Al is consumed? 4Al + 3O₂ → 2Al₂O₃A81 gB54 gC49.5 gD27 g Like 0 Discuss 0Share