Question

The above graph indicates the cooling of a substance 'X' from its gaseous state to solid stats Then which of the following statement. is/are correct []
a) The mass per unit volume of substance ‘A’ is more at point ‘A’ when compared with point "c
b) Substance ‘’ have more number of free surfaces at point E when compared ‘X' at point C.
c) Substance ‘X' have more number of free surfaces at point B when compared 'X' at point D.
d) All the above are correct​

Answer 1

The above graph indicates the cooling of a substance 'X' from its gaseous state to solid stats Then which of the following statement. is/are correct []

a) The mass per unit volume of substance ‘A’ is more at point ‘A’ when compared with point "c

b) Substance ‘’ have more number of free surfaces at point E when compared ‘X' at point C.

c) Substance ‘X' have more number of free surfaces at point B when compared 'X' at point D.

d) All the above are correct

Answer 2

Answer:

C) Free surfaces in gas are more compared to solid