Question

The graph below represents changes in water. What process is occurring during section “B” of the graph?

Answer 1

Melting

we know that ice melts at 0 ⁰C. in the graph, at position B, the temperature is constant, which indicates that phase change is taking place there. at B , from the graph , we also notice that the temperature is constant at value 0 ⁰C. this indicates that ice at 0 ⁰C is converting to water at 0 ⁰C there at position B in the graph.

hence the correct choice is   Melting.

Answer 2

Explanation :

The graph shows the variation of heat absorbed with temperature. The process takes place in five steps.

Water exists in three forms:

• Solid

• Liquid

• Gas

Section B shows the melting of water. When the solid ice converts into a liquid state the process is called melting. Here, the temperature is constant. The melting point of ice is $0^0C$. It shows that the ice is converting to water (at $0^0C$).

So, the correct option is (c) " melting ".