Match List I with List II and select the correct answer using the code given below the Lists :
| List I (Process) | List II (Type of change) |
|---|---|
| A. Heating Camphor | 1. Chemical |
| B. Cooling of water vapour up to room temperature | 2. Evaporation |
| C. Cooking an egg | 3. Condensation |
| D. Formation of water vapour at room temperature | 4. Sublimation |
Code :
A-4, B-3, C-1, D-2
A-4, B-1, C-3, D-2
A-2, B-1, C-3, D-4
A-2, B-3, C-1, D-4
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC NDA-2 – 2016
– A. Heating Camphor: Camphor changes directly from solid to gas upon heating, a process called sublimation. This is a physical change. (A-4)
– B. Cooling of water vapour up to room temperature: Water vapour (gas) changes into liquid water upon cooling, a process called condensation. This is a physical change. (B-3)
– C. Cooking an egg: Cooking an egg involves the denaturation of proteins, which is an irreversible chemical change where new substances with different properties are formed. (C-1)
– D. Formation of water vapour at room temperature: Liquid water changes into water vapour (gas) at room temperature through evaporation. This is a physical change. (D-2)
The correct match is A-4, B-3, C-1, D-2.
– Chemical changes result in the formation of new substances with different chemical properties (e.g., cooking, burning, rusting, digestion).