COMSATS Chemistry — Chemical Equilibrium
Chemical Equilibrium is part of the Chemistry section of the NTS NAT-IE test COMSATS admits on (10 of the 90 MCQs). It breaks into 2 subtopics, and we hold 29 NAT-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (2)
How Chemical Equilibrium is tested
Across the 7 NAT-pattern papers on ParhaiKrlo, Chemical Equilibrium accounts for 7 questions. It appears in all 7, about 1 questions a paper. The heaviest was COMSATS Past Paper 07, with 1 question.
| Paper | Questions |
|---|---|
| COMSATS Past Paper 07 | 1 |
| COMSATS Past Paper 06 | 1 |
| COMSATS Past Paper 05 | 1 |
| COMSATS Past Paper 04 | 1 |
| COMSATS Past Paper 03 | 1 |
| COMSATS Past Paper 02 | 1 |
| COMSATS Past Paper 01 | 1 |
Chemical Equilibrium MCQs from the NAT-pattern papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · COMSATS Past Paper 07 · Chemical Equilibrium
Which of the following is a weak acid?
- A.ethanoic (acetic) acid
- B.nitric acid
- C.hydrochloric acid
- D.sulphuric acid
Show answer
Answer: A. ethanoic (acetic) acid — Ethanoic acid ionises only partly in water.
- Q2 · COMSATS Past Paper 06 · Chemical Equilibrium
What is the pH of a 0.01 mol/dm³ solution of hydrochloric acid (fully ionised)?
- A.1
- B.0.01
- C.2
- D.12
Show answer
Answer: C. 2 — [H⁺] = 0.01 = 10⁻², so pH = 2.
- Q3 · COMSATS Past Paper 05 · Chemical Equilibrium
For the reaction N₂(g) + 3H₂(g) ⇌ 2NH₃(g), increasing the pressure shifts the equilibrium:
- A.in neither direction
- B.until the reaction stops
- C.towards ammonia, the side with fewer gas molecules
- D.towards nitrogen and hydrogen
Show answer
Answer: C. towards ammonia, the side with fewer gas molecules — 4 mol gas → 2 mol gas; higher pressure favours fewer molecules, so more NH₃.