Fundamental Concepts of ChemistryPhysical Changes21Choose 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 Changes22Choose 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 Compounds23Choose 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 Matter24Choose the best answerA 1 cm³ sample of N₂O gas contains:AElectronsBMoleculesCAtomsDAll of the above Like 0 Discuss 0Share
Fundamental Concepts of ChemistryPhysical Changes25Choose the best answerWhich is NOT a characteristic of a physical change?AFormation of a new substanceBChange may be reversibleCChemical composition remains unchangedDPhysical properties may change Like 0 Discuss 0Share