Matching Processes with Types of Change

Understanding the different types of changes that matter undergoes is fundamental in chemistry and physics. This question asks us to match specific processes with the type of change or phenomenon they represent.

Let's analyze each process listed in List I and determine its corresponding type of change or phenomenon from List II.

1. Heating of camphor: Camphor is a substance that, when heated, changes directly from a solid to a gas without passing through the liquid state. This specific process is known as sublimation. Looking at List II, option 4 is Sublimation.
2. Cooling of water vapor up to room temperature: Water vapor is water in its gaseous state. When it is cooled, it loses energy, and the gas molecules slow down and come closer together, forming liquid water. This change from gas to liquid is called condensation. Looking at List II, option 3 is Condensation.
3. Cooking an egg: When an egg is cooked, the heat causes the proteins in the egg to undergo irreversible changes. The clear liquid egg white turns into a solid white substance, and the yolk also solidifies. This involves the formation of new substances with different properties, which is characteristic of a chemical change. Looking at List II, option 1 is Chemical.
4. Formation of water vapor at room temperature: This process describes liquid water turning into water vapor (gas) at temperatures below its boiling point. This happens, for example, when a puddle dries up on a sunny day. This specific change from liquid to gas below the boiling point is called evaporation. Looking at List II, option 2 is Evaporation.

Based on this analysis, we can create the following matches:

So, the correct matching is A-4, B-3, C-1, D-2.

Revision Table: Process and Change Types

Let's summarize the key concepts involved in the question.

Additional Information: Physical vs. Chemical Changes

Changes in matter can be broadly classified into physical and chemical changes.

• Physical Change: A change in which the form or appearance of a substance changes, but its chemical identity remains the same. No new substances are formed. Examples include melting, freezing, boiling, condensation, sublimation, dissolving, cutting, or bending. Evaporation and condensation are examples of physical changes involving changes in the state of water. Sublimation is also a physical change.
• Chemical Change: A change in which one or more substances are converted into different substances with new chemical properties. This involves the breaking and forming of chemical bonds. Examples include burning, rusting, cooking, digestion, and fermentation. Cooking an egg is a classic example of a chemical change where the proteins in the egg undergo irreversible chemical reactions.

It is important to distinguish between these two types of changes to understand various natural phenomena and chemical reactions.