Question

Process of change of state from solid to liquid is called:
(a). Melting
(b). Freezing
(c). Boiling
(d). Condensation

Answer 1

- Hint- In this question we will first understand the state which will be changed and other states which will be available after conversion. And we will discuss the definition of all the given options before selecting the correct option.

Complete step-by-step solution -

According to the question state changes from solid to liquid, so we will proceed further by understanding the given options.
A) Melting: At low temperatures, most substances are solid; as the temperature increases, they become liquid; at higher temperatures still, they become gaseous. The process of a solid becoming a liquid is called melting.
B) Freezing: Freezing is the process when a liquid turns into a solid. Freezing occurs when heat is lost from an object, which causes the molecules to slow down and form tighter bonds. One example of freezing is when water turns into ice. Freezing is the opposite of melting.
C) Boiling: Boiling is the process by which a liquid turns into a vapor when it is heated to its boiling point. The change from a liquid phase to a gaseous phase occurs when the vapor pressure of the liquid is equal to the atmospheric pressure exerted on the liquid.
D) Condensation: Condensation is the process by which water vapor in the air is changed into liquid water. In other words, the water in the air, a gas known as water vapor, from your hot shower cooled when it met the surface of the cold mirror. This caused the water vapor to condense, or turn into its liquid form.
Hence, melting is the process by which state changes from solid to liquid.
So, the correct answer is option A.

Note- In order to solve such questions students must understand the property of corresponding states involved. Solid is a state of matter in which the constituting particles are arranged very closely with respect to each other and unable to move freely. The constituent particles can be atoms, molecules or ions. The liquid state of a material has a definite volume, but it does not have a definite shape and takes the shape of the container, unlike that of the solid state.