Question

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 substance (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 1

Its very easy
i)water
ii)ice
iii)water vapour
b.solidification
c.0 celsius
d.vapourization
e.100 degree celsius