Preparation of Carboxylic Acids

Q. Which one of the following is least reactive in a nucleophilic substitution reaction?

1. $C{H}_{3}C{H}_{2}Cl$
2. $C{H}_2=CHC{H}_{2}Cl$
3. $(C{H}_3{)}_{3}CCl$
4. $C{H}_2=CHCl$

Q.

. What is Baeyer’s reagent? What is its function

Q.

State the role of alkaline ${\mathrm{KMnO}}_4$ in the reaction involving the conversion of an alcohol to corresponding carboxylic acid.

Q.

Accomplish the following conversions :

(i) Nitrobenzene to benzoic acid

(ii) Benzene to m-bromophenol

(iii) Benzoic acid to aniline

(iv) Aniline to 2, 4, 6-tribromofluorobenzene

(v) Benzyl chloride to 2-phenylethanamine

(vi) Chlorobenzene to p-chloroaniline

(vii) Aniline to p-bromoaniline

(viii) Benzamide to toluene

(ix) Aniline to benzyl alcohol.

Q. Which of the following compounds will not give benzoic acid with $KMn{O}_4/H{O}^{-}/Heat$.

1. $C_6{H}_5-C(C{H}_3{)}_2-C{H}_{2}OH$
2. $C_6{H}_5-CH(C{H}_3{)}_2$
3. $C_6{H}_5-C{H}_{2}OH$
4. $C_6{H}_5-CH\left(C{H}_3\right)-COOH$

Q.

The correct order of acidic strength of halogen acids is:

1. HI < HCl < HBr < HF

2. HF <HCl < HBr < HI

3. HF < HBr < HI < HCl

4. HI < HBr < HCl < HF

Q.

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions.

(i) Ethanal, Propanal, Propanone, Butanone.

(ii) Benzaldehyde, p-Tolualdehyde, p-Nitrobenzaldehyde, Acetophenone.

Hint: Consider steric effect and electronic effect.

Q.

Name the oxidizing agent used in the conversion of alcohols into Carboxylic Acid.

Q.

Write the balanced equation for the following chemical reactions:

1. Hydrogen + Chlorine → Hydrogen chloride2. Barium chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride3. Sodium + Water → Sodium hydroxide + Hydrogen

Q. Isobutane gets oxidised with oxidising agents like alkaline $KMn{O}_4$ to:

1. Acetone
2. Ter-butyl alcohol
3. Seconadary-propyl alcohol
4. Isopropanol

Q. The synthesis of 3 - octyne is achieved by adding a bromoalkane into a mixture of sodium amide and an alkyne. The bromoalkane and alkyne respectively are

1. $BrC{H}_{2}C{H}_{2}C{H}_{2}C{H}_{2}C{H}_{3}andC{H}_{3}C{H}_{2}C\equiv CH$
2. $BrC{H}_{2}C{H}_{2}C{H}_{3}andC{H}_{3}C{H}_{2}C\equiv CH$
3. $BrC{H}_{2}C{H}_{2}C{H}_{2}C{H}_{2}C{H}_{3}andC{H}_{3}C\equiv CH$
4. $BrC{H}_{2}C{H}_{2}C{H}_{2}C{H}_{3}andC{H}_{3}C{H}_{2}C\equiv CH$

Q. Cumene on treatment with $KMn{O}_4$ gives :-

1. 
2. 
3. 
4. 

Q. The order of reactivity of the given haloalkanes towards nucleophile is

1. $RI>RBr>RCl$
2. $RBr>RCl>RI$
3. $RCl>RBr>RI$
4. $RBr>RI>RCl$

Q. In a $S_{N}2$ substitution reaction of the type
$R-Br+C{l}^{-}\stackrel{DMF}{⟶}R-Cl+B{R}^{-}$

Which of the following has the highest relative rate ?

1. 
2. $C{H}_{3}C{H}_{2}Br$
3. 
4. 

Q. In the following sequence of reaction,
$Toluene\stackrel{KMn{O}_4}{\to }A\stackrel{SOC{l}_2}{\to }B\underset{BaS{O}_4}{\overset{H_2/Pd}{\to }}C$
The product C is

1. $C_6{H}_{5}COOH$
2. $C_6{H}_{5}C{H}_3$
3. $C_6{H}_{5}C{H}_{2}OH$
4. $C_6{H}_{5}CHO$

Q. How is acetic acid prepared from
(a) ethanol

Q. Which of the following acids can be oxidised by Fehling solution?

1. Acetic acid
2. Malonic acid
3. Formic acid
4. Oxalic acid

Q.

When acetic acid reacts with ethyl alcohol, we add $\mathrm{Conc}.{\mathrm{H}}_2{\mathrm{SO}}_4$ it acts as ___________ and the process is called __________.

Q.

How many molecules of hydrogen chloride will be formed when a molecule of hydrogen reacts with one of chlorine?

Q. The well known insecticide, Gammaxene is one of the stereoisomers of hexachlorocyclohexane. The reagent useful for conversion of benzene into hexachlorocyclohexane is -

1. $3HCl$
2. $3C{l}_2/AlC{l}_3$
3. $3C{l}_2/ZnC{l}_2$
4. $3C{l}_2/hv$

Q. The IUPAC name of $\left[Co\right(H_{2}NC{H}_{2}C{H}_{2}N{H}_2{)}_3{]}_2(S{O}_4{)}_3$ :

1. Tris(ethylenediammine)cobalt(III) sulphate
2. Tri(ethylenediammine)cobalt(III) sulphate
3. Tris(ethylenediammine)cobalt(II) sulphate
4. Tris(ethylenediamine)cobalt(III) trissulphate

Q. Equilibrium constant of a reversible reaction:

1. May increases or decrease with temperature
2. Is independent of temperature
3. Increases with increase of temperature
4. Decreases with decreases of temperature

Q. Which one of the following compounds does not give a tertiary alcohol on reaction with excess of $C{H}_{3}MgBr$ followed by hydrolysis?

1. 
2. 
3. 
4. 

Q.

14. The compound formed by the chemical reaction between lead and oxygen is written as _______.

1. $\mathrm{pbo}$

2. $\mathrm{PbO}$

3. ${\mathrm{pbcl}}^2$

4. ${\mathrm{PbCl}}_2$

Q. Tertiary alcohols $\left(3^o\right)$ having atleast four carbon atoms upon drastic oxidation yield carboxylic acid with

1. Three carbon atom less

2. All the above three options are correct

3. One carbon atom less

4. Two carbon atoms less

Q.

80. Arrange the reactions given below in a proper sequence for the conversion of ethane to methane.

(1) treatment with sodium hydroxide

(2) treatment with aqueous $\mathrm{KOH}$

(3) treatment with $\mathrm{NaOH}+\mathrm{CaO}$

(4) halogenation

(5) reaction with acidified ${\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7$

1. 5 1 4 2 3

2. 4 2 5 1 3

3. 5 3 2 1 4

4. 4 5 1 2 3

Q. Which of the following statements regarding the E2 mechanism is wrong?

1. Reactions by the E2 mechanism are always bimolecular.
2. Reactions by the E2 mechanism are generally second order.
3. Reactions by the E2 mechanism usually occur in one step.
4. Reactions by the E2 mechanism usually occur in two steps.

Q. An aromic compound A of the molecular formula $C_8{H}_{10}O$ on reaction with iodine and dilute $NaOH$ gives a yellow precipitate. The structure of the compound is exprected to be:

1. 
2. 
3. 
4. 

Q.

Accomplish the following conversions:

(i) Nitrobenzene to benzoic acid

(ii) Benzene to m-bromophenol

(iii) Benzoic acid to aniline

(iv) Aniline to 2, 4, 6-tribromofluorobenzene

(v) Benzyl chloride to 2-phenylethanamine

(vi) Chlorobenzene to p-chloroaniline

(vii) Aniline to p-bromoaniline

(viii) Benzamide to toluene

(ix) Aniline to benzyl alcohol.

Q. What is the product when 2-butanol is treated with PCC in $C{H}_{2}C{l}_2$?

1. 2-butanol
2. 2-butanone
3. 1-butanone
4. 1-butanol