Fundamental Concepts of ChemistryPure Substances11Choose the best answerA pure substance is best defined as:AA substance made of two or more physically mixed componentsBA substance with fixed composition and characteristic propertiesCAny mixture of different substancesDA substance that can always be separated physically Like 0 Discuss 0Share
Fundamental Concepts of ChemistryPhysical Changes12Choose the best answerWhich of the following is a physical change?ARusting of ironBSouring of milkCDigestion of foodDSublimation of camphor Like 0 Discuss 0Share
Fundamental Concepts of ChemistryChemical Changes13Choose the best answerWhich is an example of a chemical change?AMelting of iceBSwitching on a bulbCCutting fruit into piecesDRusting of iron Like 0 Discuss 0Share
Fundamental Concepts of ChemistryProperties of Compounds14Choose the best answerWhen elements X, Y and Z chemically combine to form compound XYZ, the properties of XYZ are generally:ALike those of X and YBLike those of Y and ZCDifferent from those of X, Y and ZDSimilar to both X and Y Like 0 Discuss 0Share
Fundamental Concepts of ChemistryParticulate Nature of Matter15Choose the best answerA 1 cm³ sample of N₂O gas contains:AElectronsBMoleculesCAtomsDAll of the above Like 0 Discuss 0Share