ECAT Chemistry — Alcohols, Phenols and Ethers
Alcohols, Phenols and Ethers is part of the Chemistry section of the UET ECAT (30 of the 100 MCQs). It breaks into 3 subtopics, and we hold 23 ECAT-pattern practice MCQs on it, each with a written explanation. Tap a subtopic below to practise just that.
Subtopics (3)
How Alcohols, Phenols and Ethers is tested
Across the 7 ECAT past papers on ParhaiKrlo, Alcohols, Phenols and Ethers accounts for 10 questions. It appears in 5 of them, about 2 questions a paper. The heaviest was ECAT Past Paper 06, with 3 questions.
| Paper | Questions |
|---|---|
| ECAT Past Paper 06 | 3 |
| ECAT Past Paper 05 | 1 |
| ECAT Past Paper 04 | 2 |
| ECAT Past Paper 03 | 2 |
| ECAT Past Paper 01 | 2 |
Alcohols, Phenols and Ethers MCQs from the ECAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · ECAT Past Paper 06 · Alcohols, Phenols and Ethers
To ensure that ethanol is not used for drinking, it is converted to methylated spirit by adding:
- A.About 10% methanol and a little acetone/pyridine
- B.10% petrol and a little diesel
- C.50% alcohol
- D.Only 10% acetone
Show answer
Answer: A. About 10% methanol and a little acetone/pyridine — Methylated spirit is ethanol denatured with about 10% poisonous methanol plus small amounts of other substances.
- Q2 · ECAT Past Paper 05 · Alcohols, Phenols and Ethers
The common reagent used for the oxidation of alcohols is:
- A.K₂Cr₂O₇
- B.H₂SO₄
- C.K₂CrO₄ + H₂SO₄
- D.K₂Cr₂O₇ + H₂SO₄
Show answer
Answer: D. K₂Cr₂O₇ + H₂SO₄ — Acidified potassium dichromate (K₂Cr₂O₇ + H₂SO₄) oxidises alcohols; it turns from orange to green.
- Q3 · ECAT Past Paper 04 · Alcohols, Phenols and Ethers
To ensure that ethanol is not used for drinking, it is converted to methylated spirit by adding:
- A.About 10% methanol and a little acetone/pyridine
- B.50% alcohol
- C.10% petrol and a little diesel
- D.Only 10% acetone
Show answer
Answer: A. About 10% methanol and a little acetone/pyridine — Methylated spirit is ethanol denatured with about 10% methanol (poisonous) plus small amounts of other substances to make it undrinkable.