Which of the following is an endothermic process?

• A. Reaction of water with quick lime
• B. Dilution of an acid
• C. Neutralization of an acid using base
• D. Sublimation of camphor crystals

To determine which of the given options is an endothermic process, let's briefly define what endothermic means. An endothermic process absorbs heat from its surroundings, resulting in a temperature drop in the environment.

Analyzing Each Option

• A. Reaction of water with quick lime: This is an exothermic reaction, releasing heat.
• B. Dilution of an acid: This process can be slightly endothermic, but it generally releases some heat.
• C. Neutralization of an acid using base: This is also an exothermic reaction, producing heat.
• D. Sublimation of camphor crystals: This process absorbs heat as the solid turns into gas, making it endothermic.

Final Answer

The correct choice is D. Sublimation of camphor crystals, as it is the only option that absorbs heat from the surroundings.