What are ethers? How are they classified?

Ethers are a class of organic compounds that contain alkoxy ( - OR ) group. So, ethers are the alkoxy derivative of alkane. The general formula for ethers is R - O - R ' . Ethers are classified as symmetrical and unsymmetrical if alkyl or aryl groups attached to the oxygen atom are same then it is symmetrical ether. If the groups are mixed then the ether is unsymmetrical. For example, diethyl ether ( C 2 H 5 - O - C 2 H 5 ) , ethyl methyl ether ( CH 3 - O - C 2 H 5 ) , etc.

Write a preparation of phenol from cumene? What happens when phenol is heated with zinc dust?

When an alkaline solution of cumene in sodium carbonate is oxidised by passing air or oxygen in the presence of cobalt naphthenate as a catalyst, cumene hyperoxide is obtained. It is then heated in dilute sulphuric acid to form phenol and acetone. When phenol is heated with zinc dust, benzene is formed. ph - OH → Zn dust C 6 H 6

Identify A and B respectively in the following reaction: tert - butyl alcohol → 363 K 20 % H 2 SO 4 A + H 2 O → H 2 O 2 HBr B

2-Methylpropene, 1-bromo-2-methylpropane

2-Methylpropene, 2-bromo-2-methylpropane

2-Methylpropane, 1-bromo-2-methylpropane

2-Methylpropane, 2-bromo-2-methylpropane

What is the action of the following on isopropyl methyl ether? Hot HI

When an ether reacts with hot halogen acid haloalkanes and water are formed. This is because as soon as the alcohol is formed, it will react with halogen acid and get converted to the corresponding haloalkane and water. Hence, when isopropyl methyl ether is reacted with hot HI , a mixture of isopropyl iodide, methyl iodide and water is obtained. Reaction: ( CH 3 ) 2 CH - O - CH 3 + HI Hot → ( CH 3 ) 2 CH - I Isopropyl iodide + CH 3 I Methyl iodide + H 2 O

What is the action of the following on isopropyl methyl ether? Cold HI

When isopropyl methyl ethyl ether is reacted with cold HI, methyl iodide (lower alkyl halide) and isopropyl alcohol (higher alcohol) are formed. Reaction: ( CH 3 ) 2 CH - O - CH 3 + HI → cold / 273 K ( CH 3 ) 2 CH - OH + CH 3 I