SolidsSublimation26Choose the best answerThe direct conversion of a solid into vapour is called:AMeltingBDepositionCCondensationDSublimation Like 0 Discuss 0Share
SolidsIonic Solids27Choose the best answerNaCl is classified as a:ACovalent solidBIonic solidCMolecular solidDMetallic solid Like 0 Discuss 0Share
SolidsElectrical Conductivity of Ionic Solids28Choose the best answerIonic solids do not conduct electricity in the solid state mainly because:AThey contain no ionsBTheir ions are fixed in the crystal latticeCThey have high densityDThey are always insoluble Like 0 Discuss 0Share
SolidsIonic Solids29Choose the best answerWhich of the following is an ionic crystal?ADiamondBLiFCLiDSi Like 0 Discuss 0Share
SolidsDiffusion in Solids30Choose the best answerSolids diffuse very slowly compared with liquids and gases mainly because:ATheir temperature is always highBTheir particles are closely packed and have restricted movementCTheir density is always lowDThey are highly compressible Like 0 Discuss 0Share