Question
Which one of the following is known as 'water gas'?
NDA
General Ability
General Science
2025
NDA 2025 (Phase 2)
NDA General Ability Question (2025) — Solution
Options
- A. H_2O + CO_2
- B. NH_3
- C. H_2 + N_2
- D. CO + H_2
Answer
D. CO + H_2
Step-by-step solution
Water gas is a mixture of carbon monoxide (CO) and hydrogen gas (H_2). It is produced by passing steam over red-hot coke at high temperatures: C(s) + H_2O(g) CO(g) + H_2(g) This mixture is also known as synthesis gas or syngas. Answer: CO + H_2
Related: General Ability — General Science · All PYQ Banks