Tag: chemistry

Questions Related to chemistry

The number of monochloro derivaties of 2-methoxy propane are possible are: 

chemistry hydroxy compounds and ethers chemical properties of ethers ethers alcohols, phenols and ethers

  1. 2

  2. 1

  3. 3

  4. 4

Show answer
Correct Option: C
Explanation:

$\quad \quad \quad OC{ H } _{ 3 }\ \hspace{2mm} \quad \quad \quad |\ { H } _{ 3 }C-CH-C{ H } _{ 3 }$

2-methoxypropane
The number of monochloro derivatives are 3. They are:
1) $\quad \quad \hspace{2mm} \quad OC{ H } _{ 3 }\ \quad \quad \quad \quad |\ { H } _{ 2 }C-CH-C{ H } _{ 3 }\ \quad |\ \hspace{2mm} Cl$
2) $\quad \quad  \quad OC{ H } _{ 3 }\ \quad \hspace{2mm} \quad \quad |\ { H } _{ 3 }C-C-C{ H } _{ 3 }\ \quad \quad \hspace{2mm} \quad |\ \quad \quad \quad Cl$
3) $\quad \quad  \quad OC{ H } _{ 2 }-Cl\ \quad \hspace{2mm} \quad \quad |\ { H } _{ 3 }C-C-C{ H } _{ 3 } $

Ether on carbonylation gives:

chemistry hydroxy compounds and ethers chemical properties of ethers ethers alcohols, phenols and ethers

  1. Alkanoic acid

  2. Alkanone

  3. Alkyl alkonate

  4. Alkanal

Show answer
Correct Option: C
Explanation:

The general reaction between Ether and Carbon monoxide is 


$R-O-R+CO \rightarrow R-CO-O-R$ 

Thus, it forms the ester Alkyl alkanoate.


Option C is the correct answer.

Ethers are considered as ____.

chemistry hydroxy compounds and ethers chemical properties of ethers ethers alcohols, phenols and ethers

  1. mono alkyl derivatives of water

  2. alkoxy derivations of alkanes

  3. alkyl derivatives of fatty acids.

  4. condensation product of acid and alcohol.

Show answer
Correct Option: D

The compound obtained by the reaction of diethyl ether with chlorine in the presence of sun light , is 

chemistry hydroxy compounds and ethers chemical properties of ethers ethers alcohols, phenols and ethers

  1. Perchloro diethyl ether $H _5C _2-OC _2Cl _5$

  2. Perchloro diethyl ether $Cl _5C _2-O-C _2Cl _5$

  3. $\beta ,\beta '$ Dichloro diethyl ether $ClCH _2CH _2-O-CH _2CH _2Cl$

  4. $\alpha ,\alpha $ Dichloro diethyl ether

Show answer
Correct Option: B

Diethyl ether reacts with $\displaystyle PCl _{5}$ to form:

chemistry hydroxy compounds and ethers chemical properties of ethers ethers alcohols, phenols and ethers

  1. ethyl chloride

  2. phosphorous oxy trichloride

  3. 1,2-dichloroethane

  4. ethene

Show answer
Correct Option: A,B
Explanation:

Diethyl ether reacts with Phosphorous pentachloride on heating to form ethyl chloride.

$C _2H _5-O-C _2H _5+PCl _5\longrightarrow 2C _2H _5Cl+POCl _3$

Isopropyle methyl ether when treated with cold hydrogen iodide gives

chemistry hydroxy compounds and ethers chemical properties of ethers ethers alcohols, phenols and ethers

  1. isopropyl iodide and methyl iodide

  2. isopropyl alcohol and methyl iodide

  3. isopropyl alcohol and methyl alcohol

  4. isopropyl iodide and methyl alcohol

Show answer
Correct Option: B

Oxygen atom of ether is: 

chemistry hydroxy compounds and ethers chemical properties of ethers ethers alcohols, phenols and ethers

  1. very active

  2. replaceable

  3. active

  4. comparatively inert

Show answer
Correct Option: D
Explanation:
Oxygen atom of ether is comparatively inert.

 $C-O-C$ linkage is quite stable. Under ordinary conditions, ethers are not acted upon by dilute acids, bases and most of the oxidizing and reducing agents. 

Hence correct answer is option D.

$C _2H _5-O-C _2H _5 +  HI \xrightarrow {?}  C _2H _5-OH + C _2H _5-I$
Identify the reaction condition, in which reaction occur.

chemistry hydroxy compounds and ethers chemical properties of ethers ethers alcohols, phenols and ethers

  1. High temperature

  2. High vaccum

  3. Cold

  4. None of the above

Show answer
Correct Option: A
Explanation:

The cleavage of ethers takes places with concentration $HI$ or $HBr$ at high temperature.

Diethyl ether can be decomposed with:

chemistry hydroxy compounds and ethers chemical properties of ethers ethers alcohols, phenols and ethers

  1. $HI$

  2. $KMnO _4$

  3. $NaOH$

  4. $H _2O$

Show answer
Correct Option: A
Explanation:

On heating with concentrated Hydrogen iodide $(HI)$ the C-O bond in ethers breaks forming alcohol and alkyl iodide. For example,

 ${ C } _{ 2 }{ H } _{ 5 }-O-{ C } _{ 2 }{ H } _{ 5 }+HI\longrightarrow { C } _{ 2 }{ H } _{ 5 }-I+{ C } _{ 2 }{ H } _{ 5 }OH$

 On boiling with excess of concentrated Hydrogen iodide $(HI)$, Alkyl iodide is formed.

${ C } _{ 2 }{ H } _{ 5 }-O-{ C } _{ 2 }{ H } _{ 5 }+2HI\longrightarrow 2{ C } _{ 2 }{ H } _{ 5 }-I+{ H } _{ 2 }O$

When an ether is treated with $P _2S _5$, it gives:

chemistry hydroxy compounds and ethers chemical properties of ethers ethers alcohols, phenols and ethers

  1. thioalcohol

  2. thioether

  3. thioester

  4. thioacetal

Show answer
Correct Option: B
Explanation:

When an ether is treated with $P _2S _5$, it gives thioether.


$5C _2H _5-O-C _2H _5+P _2S _5\rightarrow\underset{Thioether}{5C _2H _5-S-C _2H _5}$

Hence option B isthe correct answer.