Consider the following pairs:

  1. Sublimation→ Solid to the gas phase 
  2. Ablation→ Removal of material from the surface of an object
  3. Deposition→ Gas changes directly into a solid

    Which of the above is/are correct?

Answer: [D] 1, 2 & 3

Removal of material from the surface of an object by vaporization is called ablation. When gas changes directly to solid without first becoming liquid is called Deposition. It is also known as desublimation. It is a thermodynamic process.

This question is a part of GKToday's Integrated IAS General Studies Module