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 exccessively, 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 getsconverted into Y
d)What is the process of conversion of X into Z known as?
e) At which temperature X gets converted into Z?
Answers
Answer:
. 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
Explanation:
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(a) The substance X is water since it turns anhydrous copper sulphate blue.
The substance Y is ice since water changes to ice upon cooling.
The substance Z is water vapour since water changes to water vapour upon heating.
(b) The process of conversion of X into Y is known as freezing.
(c ) The temperature called freezing point of water is 0°C.
(d) Water upon heating gets converted into steam (Z) and the process is known as boiling.
(e ) X gets converted into Z at its boiling point temperature. It is 100°C.