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 shaped 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 (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

Answer:

Explaa. X is a gas or vapour

Y is solid like ice

Z is liquid

b. Firstly X is compressed with large pressure and it turns into liquid (Z) and it freeze so the liquid is converted into solid (ice) Y

c. 0 degree C

d. Firstly X get converted into liquid (Z) and it freeze it gets converted into solid (ice) [Y} and after freezing the solid (ice) [Y] is heated at the temperature of 100 degree C and it converted into liquid (Y)

e. Firstly the temperature goes to 0 degree C and after freeze it will come 100 degree C from 0 degree C  

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