Question

161
10. The Temperature → Time graph for the observations obtained by heating wax in a
vessel is shown in the figure
110C
D
Co
Temperature
A
15 °C
B
Time (min.) →
State from the graph, which part of the graph denotes the changing state of the
matter.​

Answer 1

Answer:

I can understand this answer

Answer 2

Answer:

melting point of wax = 15 °c

boiling point of wax = 110°c

at point D = wax has  stared boiling. therefore it exists both in the liquid as well as gaseous states.

at point B =  wax has started melting and exists both in the solid as well as liquid states.

at  point A = wax is in the solid state.

the change of state ( solid to liquid ) is represented by the portiion A1 to B2

the change of state ( liquid to gas ) is represented by the portion D1 to D2