COMSATS Chemistry — Organic Chemistry
Organic Chemistry is part of the Chemistry section of the NTS NAT-IE test COMSATS admits on (10 of the 90 MCQs). It breaks into 4 subtopics, and we hold 32 NAT-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (4)
How Organic Chemistry is tested
Across the 7 NAT-pattern papers on ParhaiKrlo, Organic Chemistry accounts for 9 questions. It appears in all 7, about 1.3 questions a paper. The heaviest was COMSATS Past Paper 06, 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 | 2 |
| COMSATS Past Paper 05 | 1 |
| COMSATS Past Paper 04 | 1 |
| COMSATS Past Paper 03 | 2 |
| COMSATS Past Paper 02 | 1 |
| COMSATS Past Paper 01 | 1 |
Organic Chemistry MCQs from the NAT-pattern papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · COMSATS Past Paper 07 · Organic Chemistry
Benzene mainly undergoes:
- A.nucleophilic substitution reactions
- B.electrophilic substitution reactions
- C.addition reactions
- D.elimination reactions
Show answer
Answer: B. electrophilic substitution reactions — The stable delocalised π system is kept by substituting H atoms with electrophiles.
- Q2 · COMSATS Past Paper 06 · Organic Chemistry
Which of the following can show cis–trans (geometric) isomerism?
- A.butane
- B.ethene
- C.propene
- D.but-2-ene
Show answer
Answer: D. but-2-ene — Each carbon of the C=C in but-2-ene carries two different groups (H and CH₃).
- Q3 · COMSATS Past Paper 05 · Organic Chemistry
The formula of ethanol is:
- A.C₂H₅OH
- B.CH₃COOH
- C.CH₃OH
- D.C₂H₆
Show answer
Answer: A. C₂H₅OH — Ethanol is a two-carbon alcohol: CH₃CH₂OH = C₂H₅OH.