COMSATS Chemistry — Basic Concepts
Basic Concepts 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 31 NAT-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (2)
How Basic Concepts is tested
Across the 7 NAT-pattern papers on ParhaiKrlo, Basic Concepts accounts for 8 questions. It appears in all 7, about 1.1 questions a paper. The heaviest was COMSATS Past Paper 01, with 2 questions, and the most recent is COMSATS Past Paper 07, with 1.
| 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 | 2 |
Basic Concepts MCQs from the NAT-pattern papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · COMSATS Past Paper 07 · Basic Concepts
What is the mass of 3 moles of sodium chloride? (Molar mass of NaCl = 58.5 g/mol)
- A.58.5 g
- B.19.5 g
- C.61.5 g
- D.175.5 g
Show answer
Answer: D. 175.5 g — m = 3 × 58.5 = 175.5 g.
- Q2 · COMSATS Past Paper 06 · Basic Concepts
How many moles of oxygen atoms are present in one mole of carbon dioxide, CO₂?
- A.1
- B.2
- C.44
- D.3
Show answer
Answer: B. 2 — Each CO₂ has 2 O atoms, so 1 mol CO₂ has 2 mol O atoms.
- Q3 · COMSATS Past Paper 05 · Basic Concepts
What is the molar mass of sulphuric acid, H₂SO₄? (H = 1, S = 32, O = 16)
- A.96 g/mol
- B.98 g/mol
- C.82 g/mol
- D.49 g/mol
Show answer
Answer: B. 98 g/mol — 2(1) + 32 + 4(16) = 98 g/mol.