Changes in the physical in the scheme above.The letter X,Y and Z respectively represent

Assessment: JAMB UTME - Chemistry - 1990 Subject: Chemistry

Question 1 Report

Changes in the physical in the scheme above.The letter X,Y and Z respectively represent

Answer Details
The diagram above shows a process where a solid (X) is heated to form a gas (Y), which is then cooled to form a liquid (Z). The changes in physical state are sublimation (X to Y), and condensation (Y to Z). The solid changes directly to gas without passing through the liquid phase during sublimation, and the gas changes to liquid during condensation. Therefore, the answer is (A) sublimation, condensation and freezing.
Read lesson note on Solubility Of Substances (Ghana Only) (WAEC)
Read lesson note on States Of Matter (WAEC)
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