Fundamental Concepts of ChemistryMolecules and Molecular Mass6Choose the best answerWhich statement is incorrect?AH₂O is a heteroatomic moleculeBMolecular mass of H₂O₂ is 18 uCO₂ is a homodiatomic moleculeDA and C are correct Like 0 Discuss 0Share
Fundamental Concepts of ChemistryElements, Compounds and Mixtures7Choose the best answerWhich statement best describes a compound?ATwo or more elements physically mixedBTwo or more elements chemically combinedCA mixture of two or more substancesDA substance separable by filtration Like 0 Discuss 0Share
Fundamental Concepts of ChemistryReversible Physical Changes8Choose the best answerWhich description best represents a reversible physical change?APermanent and reversibleBTemporary and irreversibleCTemporary and reversibleDPermanent and irreversible Like 4 Discuss 0Share
Fundamental Concepts of ChemistryChemical Changes9Choose the best answerWhich is an example of a chemical change?ABoiling of waterBBurning of paperCEvaporation of waterDMelting of ice Like 0 Discuss 0Share
Fundamental Concepts of ChemistryAtoms and Molecules10Choose the best answerWhich phrase is scientifically acceptable?AA molecule of a compoundBA molecule of an elementCAn atom of an elementDAll of these Like 0 Discuss 0Share