GasesReal Gases and van der Waals Equation271Choose the best answerGases show significant deviation from ideal behaviour at high pressure mainly because:AIntermolecular forces and molecular volume become significantBGas molecules begin to move only in one directionCThe actual volume of gas molecules becomes zeroDIntermolecular forces become completely negligible Like 1 Discuss 0Share
StoichiometryPercentage Composition by Mass272Choose the best answerAn oxide has formula M₂O₃ and contains 68.57% oxygen by mass. The atomic mass of M is approximately:A11B22C27D56 Like 0 Discuss 0Share
S & P Block ElementsOxides of Alkali Metals273Choose the best answerSodium burns in excess oxygen mainly to form:ANa₂OBNaO₂CNa₂O₂DNa₂O₃ Like 0 Discuss 0Share
Stoichiometry Stoichiometry MCQS#Atomic Mass Unit274Choose the best answerIf an atom has a mass of 4 u, what does this mean?AIts mass is 4 g.BIt has 4 neutrons.CIts mass is four times the mass of 1 amu.DIt must be hydrogen. Like 0 Discuss 0Share
Chemical KineticsReaction Order and Molecularity275Choose the best answerWhich statement about reaction order and molecularity is false?AReaction order may be zero, positive, negative or fractional.BMolecularity is a theoretical concept applied to an elementary step.CReaction order can never equal a stoichiometric coefficient.DMolecularity is a whole number. Like 0 Discuss 0Share