ECAT Chemistry — Carboxylic Acids
Carboxylic Acids is part of the Chemistry section of the UET ECAT (30 of the 100 MCQs). It breaks into 2 subtopics, and we hold 14 ECAT-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (2)
How Carboxylic Acids is tested
Across the 7 ECAT past papers on ParhaiKrlo, Carboxylic Acids accounts for 6 questions. It appears in 5 of them, about 1.2 questions a paper. The heaviest was ECAT Past Paper 03, with 2 questions, and the most recent is ECAT Past Paper 06, with 1.
| Paper | Questions |
|---|---|
| ECAT Past Paper 06 | 1 |
| ECAT Past Paper 05 | 1 |
| ECAT Past Paper 03 | 2 |
| ECAT Past Paper 02 | 1 |
| ECAT Past Paper 01 | 1 |
Carboxylic Acids MCQs from the ECAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · ECAT Past Paper 06 · Carboxylic Acids
Which amino acids can be synthesized by our body?
- A.Basic amino acids
- B.Acidic amino acids
- C.Essential amino acids
- D.Non-essential amino acids
Show answer
Answer: D. Non-essential amino acids — Non-essential amino acids are made in the body; essential ones must come from food.
- Q2 · ECAT Past Paper 05 · Carboxylic Acids
Complete reduction of a carboxylic acid to an alkane is carried out with:
- A.HI alone
- B.Red phosphorus alone
- C.LiAlH₄
- D.HI with red phosphorus
Show answer
Answer: D. HI with red phosphorus — Heating with HI and red phosphorus reduces –COOH all the way to –CH₃.
- Q3 · ECAT Past Paper 03 · Carboxylic Acids
The smell of rancid butter is due to:
- A.Methanoic acid
- B.Formaldehyde
- C.Butanoic acid
- D.Ethanoic acid
Show answer
Answer: C. Butanoic acid — Butter fats hydrolyse to butanoic (butyric) acid, which has the rancid smell.