Question

Which of the following statements regarding ethers is NOT true?

• A. Aryl alkyl ethers have weaker and longer bonds between oxygen and aromatic ring.
• B. The alkoxy group in aryl alkyl ethers exhibits \(+R\) effect.
• C. When ethers are exposed to the atmosphere, they form corresponding peroxides.
• D. Ethers dissolve in cold, concentrated \(\text{H}_{2}\text{SO}_{4}\)

Hint:

In aryl alkyl ethers the aryl C-O bond has partial double bond character.

Answer 1

The Correct Option is A

Step 1: Resonance
Delocalisation of oxygen's lone pair into the ring shortens and strengthens the aryl C-O bond.

Step 2: Check the other statements
The alkoxy group is ring activating ($+R$), ethers form peroxides, and ethers dissolve in cold conc. $\text{H}_{2}\text{SO}_{4}$.

Step 3: Select
Only the first statement contradicts these facts.

Final Answer:
The aryl C-O bond is stronger and shorter, so the first statement is false. \[ \boxed{\text{(A) }\text{Aryl alkyl ethers have weaker and longer bonds between oxygen and aromatic ring.}} \]