Question
Which of the following processes is an endothermic ?
MHT CET
Chemistry
Thermodynamics (C)
2026
MHT CET 2026 (17 April Shift 2)
MHT CET Chemistry Question (2026) — Solution
Options
- A. The aqueous NaOH and HCl solutions mixed together.
- B. Formation of ammonia by Haber process.
- C. Ice melts at room temperature.
- D. The freezing of liquid water.
Answer
C. Ice melts at room temperature.
Step-by-step solution
Mixing of aqueous NaOH and HCl is a neutralization reaction, which is highly exothermic. Formation of ammonia by the Haber process is an exothermic reaction as heat is released. Melting of ice requires the absorption of heat from the surroundings to overcome the intermolecular forces of attraction between water molecules. Thus, it is an endothermic process. Freezing of liquid water releases heat to the surroundings, making it an exothermic process. Answer: Ice melts at room temperature.
Related: Chemistry — Thermodynamics (C) · All PYQ Banks