Chemical properties of ethers - class-XII

Question 1 Multiple Choice (Single Answer)

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

intermolecular hydrogen bonding in ethers
dipolar character of ethers
alcohols having resonance structures
intermolecular hydrogen bonding in alcohols

Question 2 Multiple Choice (Single Answer)

An organic compound with molecular formula $C _4H _{10}O$ does not react with sodium . With excess of HI it gives only one type of alkyl halide. The compound is:

$C _2H _5OC _2H _5$
$CH _3{\underset{OCH _3}{\underset{|}{C}}}HCH _3$
$CH _3CH _2CH _2OCH _3$
$CH _3CH _2CH _2CH _2OH$

Question 3 Multiple Choice (Single Answer)

Which of the following products are not correctly matched in the given reactions?

$C _2H _5OCH _3 + HBr \xrightarrow{373K} C _2H _5OH + CH _3Br$
$C _2H _5OC _2H _5 + 2HI \rightarrow C _2H5I + C _2H _5OH$
$C _2H _5OC _2H _5 + \overset{Excess}{HCl} \xrightarrow{Cold} [(C _2H _5) _2O^+H]Cl^-$
$(CH _3) _3COC _2H _5 \xrightarrow{HI} (CH _3) _3CI + C _2H _5OH$

Question 4 Multiple Choice (Single Answer)

Anisole on reaction with chloromethane in presence of anhydrous $AlCl _3$ gives ___________.

o-methyl anisole and p-methoxy anisole
p-methyl anisole and p-methoxy anisole
o-methyl anisole and p-methyl anisole
o-methoxy acetphenone and p-methoxy acetophenone .

Question 5 Multiple Choice (Single Answer)

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

2
1
3
4

Question 6 Multiple Choice (Single Answer)

Ether on carbonylation gives:

Alkanoic acid
Alkanone
Alkyl alkonate
Alkanal

Question 7 Multiple Choice (Single Answer)

Ethers are considered as ____.

mono alkyl derivatives of water
alkoxy derivations of alkanes
alkyl derivatives of fatty acids.
condensation product of acid and alcohol.

Question 8 Multiple Choice (Single Answer)

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

Perchloro diethyl ether $H _5C _2-OC _2Cl _5$
Perchloro diethyl ether $Cl _5C _2-O-C _2Cl _5$
$\beta ,\beta '$ Dichloro diethyl ether $ClCH _2CH _2-O-CH _2CH _2Cl$
$\alpha ,\alpha $ Dichloro diethyl ether

Question 9 Multiple Choice (Multiple Answers)

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

ethyl chloride
phosphorous oxy trichloride
1,2-dichloroethane
ethene

Question 10 Multiple Choice (Single Answer)

Isopropyle methyl ether when treated with cold hydrogen iodide gives

isopropyl iodide and methyl iodide
isopropyl alcohol and methyl iodide
isopropyl alcohol and methyl alcohol
isopropyl iodide and methyl alcohol

Question 11 Multiple Choice (Single Answer)

Oxygen atom of ether is:

very active
replaceable
active
comparatively inert

Question 12 Multiple Choice (Single Answer)

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

High temperature
High vaccum
Cold
None of the above

Question 13 Multiple Choice (Single Answer)

Diethyl ether can be decomposed with:

$HI$
$KMnO _4$
$NaOH$
$H _2O$

Question 14 Multiple Choice (Single Answer)

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

thioalcohol
thioether
thioester
thioacetal

Question 15 Multiple Choice (Single Answer)

Ethers are heated with excess of conc. hydrogen halide to give alkyl halide, then the reactivity order of hydrogen halide is :

$HCl < HBr < HF$
$HI > HBr > HCl $
$HF < HCl < HBr $
none of these

Question 16 Multiple Choice (Single Answer)

Ethyl phenyl ether on boiling with conc. HBr gives:

phenol and ethane
bromobenzene and ethane
phenol and ethyl bromide
bromobenzene and ethanol

Chemical properties of ethers - class-XII

Questions