The heating curve of a particular substance in solid state is as shown in the figure: Choose the correct alternative.

RS part of the graph indicates ___ state of substance.

Options

A. solid
B. liquid
C. gaseous
D. Cannot be determined

Answer

B

Explanation

The substance is in solid state from `-50^@C` to `-39^@C` and it changes its state at `-39^@C`, i.e., converts into liquid state. Therefore, it will be in liquid state from `-39^@C` to `357^@C`. Hence, `bar(RS)` part of the graph indicates liquid state.