SolidsSublimation41Choose the best answerThe direct conversion of a solid into vapour is called:AMeltingBDepositionCCondensationDSublimation Like 0 Discuss 0Share
SolidsElectrical Conductivity of Solids42Choose the best answerWhich statement about electrical conduction is correct?AIonic solids conduct well in the solid stateBMetals conduct in the solid state, while ionic compounds conduct when moltenCMolecular solids are always excellent conductorsDCovalent-network solids always conduct electricity Like 0 Discuss 0Share
SolidsCovalent-Network Solids43Choose the best answerQuartz is a crystalline form of:ASilicaBSodium silicateCSilicon carbideDSilicon Like 0 Discuss 0Share
SolidsElectrical Conductivity of Solids44Choose the best answerWhich of the following is a good electrical conductor?ADiamondBGraphiteCSiliconDAmorphous carbon Like 0 Discuss 0Share
SolidsElectrical Conductivity of Ionic Solids45Choose the best answerIonic compounds conduct electricity in the molten state because:AMolecules are formedBIons become free to moveCNeutral atoms are formedDNew electrons are produced Like 0 Discuss 0Share