Tag: alcohols, phenols and ethers

Quizzes (9) Questions (75)

Questions Related to alcohols, phenols and ethers

Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

An ether is more volatile than an alcohol having the same molecular formula, This is due to: 

  1. dipolar character of ethers

  2. alcohols having resonance structures

  3. intermolecular hydrogen bonding in ethers

  4. intermolecular hydrogen bonding in alcohols
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An ether is more volatile than an alcohol having same molecular formula because intermolecular hydrogen bonding in alcohols. 


The $-OH$ group of alcohol can form intermolecular hydrogen bonds whereas $-O$ group of ethers cannot form hydrogen bonds. 

Hydrogen bond formation is possible when $H$ atom is attached to electronegative $N$, $O$ or $F$ atom. Intermolecular hydrogen bonds leads to molecular association. 

Hence correct answer is option D.

Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

The boiling point of thioether are than those of ethers.

  1. higher

  2. lower

  3. equal

  4. nearly same
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Thioethers (sulfides) have higher boiling points than their corresponding ethers because sulfur is larger and less electronegative than oxygen, leading to greater polarizability and stronger London dispersion forces.

Multiple choice chemistry hydroxy compounds and ethers physical properties of ethers ethers alcohols, phenols and ethers

Ether which is liquid at room temperature is:

  1. $C _2H _5 - O - CH _3$
  2. $CH _3 - O - CH _3$
  3. $C _2H _5 - O - C _2H _5$

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Dimethyl ether (CH3-OCH3) is a gas at room temperature (bp -24 C). Ethyl methyl ether (C2H5-OCH3) has a boiling point of about 7-8 C, making it a volatile liquid at room temperature. Diethyl ether (C2H5-OC2H5) is also a liquid, but the question implies identifying a specific example.