Why benzoic acid does not undergo Friedel-crafts reaction?

When the carboxyl group is attached to the benzene ring, so it acts as a deactivating and meta-directing group. It decreases the electron density on the benzene ring, therefore they undergo electrophilic substitution reaction. In the Friedel-Craft reaction, AlCl 3 is used which acts as a Lewis acid, so it bonds with the carboxyl group, not with the benzene. Therefore, benzoic acid does not undergo a Friedel-Craft reaction.

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12th ICSE

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What is meant by the following terms? Give an example of the reaction in each case. Ketal

Important Questions on Aldehydes, Ketones and Carboxylic Acids

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12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 12 - Aldehydes, Ketones and Carboxylic Acids>Chapter Practice>Q 47

What is meant by the terms Imine? Give an example of the reaction in each case.

MEDIUM

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All In One ISC Chemistry Class 12>Chapter 12 - Aldehydes, Ketones and Carboxylic Acids>Chapter Practice>Q 47

What is meant by Schiff’s base? Give an example of the reaction in each case.

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12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 12 - Aldehydes, Ketones and Carboxylic Acids>Chapter Practice>Q 48

Differentiate between the following:
Propanoic acid and acrylic acid

({CH}_{2} = CH - COOH)

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 12 - Aldehydes, Ketones and Carboxylic Acids>Chapter Practice>Q 48

Differentiate the following:
2-bromopropanoic acid

({CH}_{3} CHBrCOOH)

and pyruvic acid

({CH}_{3} COCOOH)

EASY

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 12 - Aldehydes, Ketones and Carboxylic Acids>Chapter Practice>Q 48

Differentiate between the following: Malonic acid

(COOH - {CH}_{2} - COOH)

and succinic acid

({CH}_{2} COOH - {CH}_{2} COOH)

HARD

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IMPORTANT

All In One ISC Chemistry Class 12>Chapter 12 - Aldehydes, Ketones and Carboxylic Acids>Chapter Practice>Q 49

An organic compound

(P)

having molecular formula

C_{9} H_{10} O

, form an orange precipitate

(Q)

with

2, 4 - DNP

reagent. Compound

(P)

gives a yellow precipitate

(R)

when heated in the presence of iodine and

NaOH

along with a colourless compound

(S)

(P)

neither reduce Tollen’s reagent or Fehling’s solution nor it decolourises bromine water. On drastic oxidation of

(P)

with chromic acid, a carboxylic acid

(T)

having molecular formula

C_{7} H_{6} O_{2}

is obtained. Deduce the structures of the compounds

(P)

(T)

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12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 12 - Aldehydes, Ketones and Carboxylic Acids>Chapter Practice>Q 50

An organic compound

A

has the molecular formula

C_{7} H_{6} O

. When A is treated with

NaOH

followed by acid hydrolysis, it gives two products

B

and

C

. When

B

is oxidized, it gives

A

. When

A

and

C

are each treated separately with

{PCl}_{5}

, they give two different products

D

and

E

. Identify

A, B, C, D

and

E

HARD

12th ICSE

IMPORTANT

All In One ISC Chemistry Class 12>Chapter 12 - Aldehydes, Ketones and Carboxylic Acids>Chapter Practice>Q 50

An organic compound A has the molecular formula

C_{7} H_{6} O

. When A is treated with

NaOH

followed by acid hydrolysis, it gives two products

B

and

C

. When

B

is oxidized, it gives

A

When

A

and

C

are each treated separately with

{PCI}_{5}

, they give two different products

D

and

E

. Give the chemical reaction when

A

is treated with

NaOH

and name the reaction

What is meant by the following terms? Give an example of the reaction in each case. Ketal

Important Questions on Aldehydes, Ketones and Carboxylic Acids

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