LiquidsAnomalous Behaviour of Water886Choose the best answerWater becomes less dense when it freezes because:AAn open hydrogen-bonded structure containing empty spaces formsBIonic bonds are formedCO–H bonds disappearDMolecular mass decreases Like 0 Discuss 0Share
SINDH MDCAT 2019 CHEMISTRY#Chemical Kinetics#Order of Reaction887Choose the best answerWhat is the order of the following reaction (2NO + O₂ → 2NO₂): (Sindh MDCAT 2019)A0B1C2D3 Like 0 Discuss 0Share
Chemical BondingLewis Acids and Bases888Choose the best answerWhich species has no tendency to donate a lone pair to H⁺?ANH₃BH₂OCBF₃DCH₃OH Like 0 Discuss 0Share
StoichiometryCombustion analysis889Choose the best answerWhich method is commonly used to analyze organic compounds containing C, H and O?ADecompositionBHydrogenationCCombustionDReduction Like 0 Discuss 0Share
Stoichiometry 11#Atomic Structure#Isotopes890Choose the best answerHow is atomic mass in amu related to natural isotopes?Aamu ignores isotopes.Bamu depends on only one isotope of each element.CAtomic mass in amu reflects the weighted contribution of all naturally occurring isotopes.Damu is calculated using only neutrons. Like 0 Discuss 0Share