Freidel Craft Alkylation Acylation

Q.

How would you convert the following compounds into benzene?
(i) Ethyne

(ii) Ethene

(iii) Hexane

Q. Friedel-Crafts alkylation is expected to proceed through a carbocation intermediate. What would be the alkylation product when benzene reacts with cyclopropyl chloride in the presence of $AlC{l}_3$?

1. 
2. 
3. 
4. 

Q.

How will you prepare the following compounds from benzene ? You may use any inorganic reagent and any organic reagent having not more than one carbon atom.

Methyl benzoate

m - nitrobenzoic acid

p - nitrobenzoic acid

Phenyl acetic acid

p - nitrobenzaldehyde.

Q.

What happens when phenol is treated with bromine?

Q.

Arrange the following: ${\mathrm{H}}_2\mathrm{S},{\mathrm{H}}_2\mathrm{O},{\mathrm{H}}_2\mathrm{Se}\&{\mathrm{H}}_2\mathrm{Te}$ in order of increasing acidity

Q.

How will you convert Benzene to Benzoic acid?

Q. Benzene reacts with n-propyl chloride in the presence of anhydrous $AlC{l}_3$ to give predominantly

1. 3-propyl-1-chlorobenzene
2. no reaction
3. n-propyl benzene
4. isopropyl benzene

Q.

Complete the following reaction:-
${\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{Br}+\mathrm{KCN}\to$

Q. Compound “A” on reduction with Sn/HCl gives “B” which on further reaction with $CHC{l}_3$ and alcoholic KOH gives compound “C”. The compound upon hydrolysis gives aniline. The compound “A” is :

1. nitrobenzene
2. methylamine
3. nitromethane
4. nitrosobenzene

Q.

Which of the following compound would undergo SN1 reaction faster and why?

(C₆H₅)CH₂Cl. Or. (C₆H₁₁)CH₂Cl

Q. Which of the following compound will undergo electrophilic substitution more readily than benzene?

1. Nitrobenzene
2. Benzoic acid
3. Benzaldehyde
4. Phenol

Q. For preparing monoalkyl benzene, acylation process is preferred than direct alkylation because:

1. in alkylation, a poisonous gas is evolved
2. in alkylation, large amount of heat is evolved
3. in alkylation, polyalkylated product is formed
4. alkylation is very costly

Q. Predict the major product in the following reaction :

1. 
2. 
3. 
4. 

Q.

How would you convert the following compounds into benzene?

(i) Ethyne (ii) Ethene (iii) Hexane

Q. Which of the following can be used as the halide component for Friedel-Crafts reaction ?

1. Chloroethene
2. Isopropyl chloride
3. Chlorobenzene
4. Bromobenzene

Q.

Statement-1 : Friedel-crafts reaction between benzene and acetic anhydride in the presence of anhydrous $AlC{l}_3$ yields acetophenone and not poly substituted products.
Statement-2 : Acetophenone formed, poisons the catalyst preventing further reaction.

1. Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanation of Statement-1.
   

2. Both Statement-1 and Statement-2 are true and Statement-2 is not the correct explanation of Statement-1.
   

3. Statement-1 is true but Statement-2 is false.
   
   

4. Statement-1 is false but Statement-2 is true.

Q.

Reduction of carbonyl group into –CH₂ in presence of Zn-Hg/HCl is an example of:

1. Kolbes reaction

2. Rosenmunds reduction

3. Wolff-Kishner Reduction

4. Clemmensen reduction

Q.

Consider the compounds, $BC{l}_3$ and $CC{l}_4$. How will they behave with water? Justify.

Q. Of the five isomeric hexanes, the isomer which can give only two monochlorinated compounds is

1. 2-methylpentane
2. 2, 2-dimethylbutane
3. 2, 3-dimethylbutane
4. n-hexane

Q. 1, 2-dibromoburane is allowed to react with Mg in dry ether .The product formed is (along with mechanism)

Q. How do you convert the following?

(a) Ethanal to Propanone

(b) Toluene to Benzoic acid

Q.

A compound which is not a constitution isomer of

is

1. 

2. 

3. 

4. 

Q. What is propargyl halide?

Q.

Which solvent is used in Friedel Crafts reaction?

Q. Predict the major organic product for given Friedel-Crafts alkylation reaction:

1. Methylbenzene
2. Dimethylbenzene
3. Ethylbenzene
4. Isopropylbenzene

Q. Which equation represents an example of Friedel-Craft's alkylation reaction ?

1. $C_6{H}_6+C_2{H}_{5}Cl\stackrel{AlC{l}_3}{⟶}{C}_6{H}_5{C}_2{H}_5+HCl$
2. $C_2{H}_{5}OH+HCl\stackrel{ZnC{l}_2}{⟶}{C}_2{H}_{5}Cl+H_{2}O$
3. $C_6{H}_{5}Cl+C{H}_{3}COCl\stackrel{AlC{l}_3}{⟶}{C}_6{H}_{5}COC{H}_3+C{l}_2$
4. $C_2{H}_{5}Br+Mg\stackrel{Ether}{⟶}{C}_2{H}_{5}MgBr$

Q. When Grignard reagent reacts with ketone, it yields:

1. ethanol
2. $2^{\circ }$ alcohol
3. $3^{\circ }$ alcohol
4. $1^{\circ }$ alcohol

Q. Among the following the number of reaction(s) that produce(s) benzaldehyde is :
(a)
(b)

(c)

(d)
(e)
(f)
(g)

Q. Identify the carboxylic acid chloride that might be used in a Friedel-Crafts reaction to prepare the following acyl benzene.

1. 
2. 
3. 
4. None of the above

Q. A mixture of two chlorine organic compounds was treated with sodium metal in ether solution. Isobutane was obtained as one of the products. The two chlorine compounds are:

1. Methyl chloride and Propyl chloride
2. Methyl chloride and Ethyl chloride
3. Isopropyl chloride and Methyl chloride
4. Isopropyl chloride and Ethyl chloride