The substance X normally exists in a physical state which can flow easily but does not fill its vessel completely. It also turns anhydrous copper sulphate blue. When substance X is cooled excessively, it changes into a substance Y which has a fixed shape as well as a fixed volume. If, however, the substance X is heated strongly, it changes into a substance Z which has neither a fixed shape nor a fixed volume.(a) Name the substances (i) X (ii) Y and (iii) Z.(b) What is the process of conversion of X into Y known as ?(c ) At which temperature X gets converted into Y ?(d) What is the process of conversion of X into Z known as ?(e)At which temperature X gets converted into Z ?

The substance X normally exists in a physical state which can flow eas

1.	The substance X normally exists in a physical state which can flow easily but does not fill its vessel completely. It also turns anhydrous copper sulphate blue. When substance X is cooled excessively, it changes into a substance Y which has a fixed shape as well as a fixed volume. If, however, the substance X is heated strongly, it changes into a substance Z which has neither a fixed shape nor a fixed volume.(a) Name the substances (i) X (ii) Y and (iii) Z.(b) What is the process of conversion of X into Y known as ?(c ) At which temperature X gets converted into Y ?(d) What is the process of conversion of X into Z known as ?(e)At which temperature X gets converted into Z ?
Answer» Answer :(a) (i) Water (ii) Ice (III) STEAM (B) Freezing(c ) `0^(@)C` (d) Boiling (or VAPORISATION)(e)`100^(@)C`