Fundamental Concepts of ChemistryCompounds26Choose the best answerA compound contains:ADifferent kinds of atoms physically mixedBThe same kind of atoms physically mixedCDifferent kinds of atoms chemically combinedDOnly one kind of atom chemically combined Like 0 Discuss 0Share
Fundamental Concepts of ChemistryPhase Changes27Choose the best answerConversion of a solid into a liquid is called:AMelting or fusionBCondensationCSublimationDFreezing Like 0 Discuss 0Share
Fundamental Concepts of ChemistryPhysical and Chemical Changes28Choose the best answerWhich of the following are chemical processes? (1) Rusting of a nail (2) Freezing of water (3) Decomposition of water into H₂ and O₂ (4) Compression of O₂ gasA2, 3 and 4B1, 3 and 4C1 and 3D1 and 2 Like 0 Discuss 0Share