Practice Physical Properties (8) - Chapter 11: Alcohols, Phenols, and Ethers

Practice: Physical Properties

Lesson 8Alcohols, Phenols, and Ethers

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10 questions

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6 sample questions

Question 1.
Describe the appearance and smell of pure phenol.
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Think of old disinfectants.
Question 2.
Why does a sample of phenol turn pink on standing?
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Which component of air causes slow chemical changes?
3Question 3.
Which nitrophenol is volatile in steam?
- o-Nitrophenol
- p-Nitrophenol
- m-Nitrophenol
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The groups must be next to each other.
4Question 4.
The pink colour of an old sample of phenol is due to
- Slow oxidation by air
- Absorption of water vapour
- Reaction with nitrogen of the air
- Melting of the crystals
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The colour change is a chemical reaction with the air.
Question 5.
After phenol is nitrated with dilute nitric acid, a mixture of o-nitrophenol and p-nitrophenol is obtained. Explain how the two can be separated and why the method works.
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One isomer's hydrogen bond is "used up" inside the molecule.
Question 6.
Place benzene, phenol and ethanol in increasing order of solubility in water and explain the order using hydrogen bonding and the size of the non-polar part.
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Ask two questions for each: can it hydrogen-bond with water, and how big is its non-polar part?

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