UNIT#18 CARBOXYLIC ACIDS Flashcards by . .

The general formula for carboxylic acid is:

CnH2nO2

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Which of the following is an unsaturated carboxylic acid:

Maleic acid

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Acetic acid exists as a dimer in benzene due to:

Hydrogen Bonding

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An acid with an unpleasant smell:

Butyric acid

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Glacial acetic acid at low temperature is a:

Ice like solid

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Which of the following is an unsaturated aliphatic organic acid

Maleic acid

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Which one is a carboxylic acid?

Palmitic acid

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Organic acid which cannot be obtained by hydrolysis of fats

Succinic Acid
(Fats on hydrolysis give unsaturated fatty acids)

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By oxidation of which compound carboxylic acids cannot be obtained

2-Methyl-2-Propanol

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A compound is oxidized to X, by further oxidation of X if the resulting compound is butyric acid, starting compound can be:

Butanol

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Alkane nitriles on boiling with which type of acid gives organic acids

Mineral Acids

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If ethanoic acid is to be prepared by hydrolysis of alkane nitriles, which of the following can be the reagent to be hydrolyzed?

CH3CN

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ALkane nitriles can be prepared by treating alkyl halide with:

Alcoholic potassium cyanide

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Propanoic acid is produced from ___ on acid hydrolysis.

Ethyl cyanide

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Potassium carbonate is decomposed by acetic acid and releases a gas, the nature of the gas is:

Acidic

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Which group of carboxylic acids is active for reaction with alkali metal carbonates?

H-atom of OH group

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Which reaction can be used in artificial juices formation with carboxylic acids

Esterification

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The addition of ethyl alcohol in protonated acetic acid is:

Nucleophilic addition

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Benzyl alcohol and acetic acid give a compound with ___ fragrance.

Jasmine

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Ammonium acetate converts to acetamide by:

➡Heating
➡Dehydration

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Which of the following represents acid amide

CH3CONH2

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Which sequence of groups replaces OH o carboxylic acid with halides, esters and amides respectively?

➡X
➡OR
➡NH2

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Which gas is released during acid halide formation with the help of thionyl chloride and carboxylic acids

SO2

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During the formation of an acid amide from ethanoic acid, what actually happens:

Displacement of the -OH from the acid by -NH2

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Carboxylic acids react with active metals (Na, K, Ca and Mg) to form their salt and :

H2 gas

Which pair can be used as a reactant for the preparation of acetyl chloride:

➡CH3COOH, PCl5 ➡CH3COOH, SOCl2

For the production of a carboxylic acid derivative. The reaction of nucleophilic to carboxyl group is always followed by the displacement of :

-OH group

The work of concentrated H2SO4 in the esterification process is as:

➡Dehydrating agent ➡Catalyst

Acetyl chloride is soluble in which solvent:

➡Water ➡Ether

Which of the following is not an example of an electrophilic substitution reaction?

➡Reaction of CH3COOH and Na❌ ➡Reaction of CH3COOH and NaHCO3❌ ➡Reaction of CH3COOH and Na2CO3❌ ➡Reaction of CH3COOH and PCl5✅

Identify reversible reactions among the following.

➡Esterification✅ ➡Acid Halide Formation❌ ➡Acid Anhydride Formation❌ ➡Acid Amide Formation❌

Ethyl butyrate is an ester formed by the combination of __ and butyric acid.

Ethyl Alcohol

By product produced during hydrolysis of alkane nitrile in the basic medium is:

NH3

2CH3COOH + x Ca ➡Ca(OCOCH3)2. Calculate value of 'x'.

Which of the following carboxylic acid derivative is the least reactive?

Acid Amide

The stronger acid among the following is:

➡Cl3CCOOH✅ ➡ClCH2COOH❌ ➡Cl2CHCOOH❌ ➡CH3COOH❌

The strength of the organic acids and chloro substituted acids is measured by the pKa scale such that a smaller value of pKa corresponds to:

Stronger acid

Organic acids (Carboxylic acids) are considered as:

Weak acids

Identify the strongest conjugate base among the following:

➡OH-❌ ➡RCOO-❌ ➡-OR✅ ➡PhO-❌

The fruity smell of organic compounds is because of;

Ester

From which of the following sources, acetic acid was first isolated?

Vinegar

Acetic acid is used to prepare:

➡Acetone ➡Acetate ➡Esters

Which is formed when hydrogen is added to the carboxylic group?

Methane

A number of oxygen in the cyclic ring of a dimer of carboxylic acid are:

Which of the following is used in perfumes

Alcohol

Which is formed when hydrogen is added to the carboxylic group in presence of HI in phosphorus

Ethane

Acetic acid s used to prepare:

➡Acetone ➡Acetate ➡Esters

Which s dibasic carboxylic acid

Oxalic acid

In benzene, carboxylic acids exist as ____?

Dimers

Which of the following catalyst is used for the preparation of acidic anhydrides?

P2O5

The reaction of carboxylic acids which involve H atom removal of OH group from _____ as major products in all reactions?

Salts

Which of the following are most soluble in water?

Ethanoic acid

Formic acid is obtained from:

Ant's sting

When two carboxylic acids are strongly heated in the presence of P2O5, which product is formed?

Acid Anhydrides

Which of the following is a carboxylic acid derivative?

Acyl Halide

Which of the following is the weaker acid?

CH3COOH

How carboxylic acids are formed from alcohol?

Oxidation

Acetic acid is also named as:

Ethanoic acid

The flavour of amyl butyrate?

Apricot

All are aliphatic carboxylic acids except:

➡Methanoic acid❌ ➡Ethanoic acid❌ ➡Benzoic acid✅ ➡Lactic acid❌

Which of the following causes a complete reduction of a carboxylic acid into alkanes?

HI/P

Another name for oxalic acid is:

Ethanedioic acid

Which one of the following is not fatty acid

Phthalic acid

Carboxylic acid with alcohol is called:

Esterification

Amino acid and alcohol are mixed which product will be formed?

Ether

Phthalic acid is:

Dicarboxylic acid

When fat reacts with NaOH, the reaction is called:

Saponification

Which of the following is used as a coagulant for latex in the rubber industry:

Acetic acid

Glycine is an amino acid which is present in solution as:

Zwitter ion

The reverse of esterification is:

Hydrolysis

Phthalic acid:

Dicarboyxlic aromatic acid

Which one is a weak acid:

➡Acetic acid❌ ➡Formic acid❌ ➡Propanoic acid❌ ➡Butanoic acid✅

Hydrolysis of cyano group by aqueous acid results into;

Carboxylic acids

Which of the following compounds in the form of an aqueous solution will produce CO2 on reaction with sodium carbonate?

C2H5CO-CO

CH3CN + HCl ➡A + B in presence of water in the above reaction will produce CO2 in reaction with sodium carbonate:

➡Acetic acid ➡Ammonium chloride

Consider the following reaction CH3COOH + Mg(metal) ➡? What product will form:

Magnesium Acetate

CH₃COOH + PCl5 ➡ the products of the above reaction are:

CH₃COCl + POCl₃ + HCl

The -NH-CO group is called;

Amide group

When CH3-CH2-Oh is oxidized in the presence of K2Cr2O7 and H2SO4, the product formed is:

CH₃COOH

When ethanoyl chloride reacts with methylamine an amide is formed. What is the structure of it amide formed?

CH3-CO-NHCH3

The relative strength of alcohol, phenol, water and carboxylic acids is;

Carboxylic acids > Phenol > Water > Alcohol

Methyl cyanides, on boiling with mineral acids or alkalies, yield:

Acetic acid

The formation of ester from acetic acid in presence of acid and ethanol is a:

Nucleophilic substitution reaction

CH3-COOH + NH3 ➡ The final products formed are:

CH3-CO-NH2 + H2O

Ethyl butyrate and butyl butanoate are esters with the flavour of:

Pineapple

Organic compounds 'X' and 'Y' both can react with Na-metal to evolve hydrogen gas. 'X' and 'Y' react with each other to form an organic compound 'Z' which gives fruity smell. What types of compounds 'X', 'Y' and

➡X: Alcohol ➡Y: Acetic Acid ➡Z: Ester

An organic acid 'z' reacts completely with sodium bicarbonate, sodium hydroxide and sodium carbonate. Which of the following represents the structure of 'z'.

H3C-CH2-COOH

CH3COOH + CH3CH2OH ➡ CH3COOC2H5 + H2O Which of the following will act as a catalyst in the above reaction?

H2SO4

Which of the following reaction of a carboxylic acid is reversible?

Esterification

The order of the acid strength is:

CCl3COOH> CHCl2COOH> CH2ClCOOH> CH3COOH

Compounds having -C≡N group are called;

Nitriles

The final product of hydrolysis of nitrile yield:

Carboxylic acid

During esterification, the bond from alcohol that breaks in between:

Oxygen and Hydrogen

C2H5OH + CH2COOH ➡CH3COOC2H5 + H2O Which of the following catalyst is used in the above reaction?

Conc. H2SO4

Which product s formed by the reaction of a carboxylic acid with alcohol?

Ester

Which one will act as a strong acid?

Trichloroethanoic acid

Acetyl chloride(Ethanoyl chloride) is used in the synthesis of organic compounds. It is prepared by treating acetic acid with:

SOCl2

What will be the outcome of the reaction of methanol with ethanoic acid in the presence of concentrated sulphuric acid?

Methyl ethanoate is formed

Which one o the following compounds can exist in the form of cyclic dimers?

A carboxylic acid

The reagent used to reduce a carboxylic acid to an alkane is:

NaBH4

Which of the following is not a fatty acid?

Phenylacetic acid

Select the correct order of acids' strength.

CHCl2COOH>CH2ClCOOH>CH3COOH

Which compound shows the highest boiling point?

➡CH3COOH✅ ➡C2H5OH❌ ➡C2H5-O-C2H5❌ ➡(CH3CH2)3N❌

Which one is more reactive?

➡Ester❌ ➡Acid Halide✅ ➡Amide❌ ➡Acid Anhydride❌

Nitriles (RCN) on hydrolysis in the presence of mineral acid yield:

Carboxylic acids

Carboxylic acids can be reduced into corresponding alcohols. Which of the following reagent can be used for this purpose?

LiAlH4

Which of the following reagent is required for the preparation of acyl chloride (CH3COCl) from ethanoic acid

PCl5

Which o the following is the strongest acid?

➡Propanoic acid❌ ➡Fluoroethanoic acid❌ ➡Trichloroethanic acid✅ ➡Nitroethanoic acid❌

Hydrolysis of acyl chloride results in the formation of:

Carboxylic acids

The exact reactivity order for carboxylic acid derivatives is;

Acyl Chloride > Anhydride > Ester

A carboxyl acid contains a functional group:

a carboxyl group

Of the following carboxylic acids which acid has higher acidity;

➡Nitroethanoic acid✅ ➡Ethanoic acid❌ ➡Propanoic acid❌ ➡Chloroethanoic acid❌

Which reagent is used to reduce carboxylic acid?

LiAlH4

Stronger acid is;

HCOOh

Acetamide is prepared by:

Heating ammonium acetate

Carboxylic acids react with the metal to form salts with the evolution of:

Ethane-1,2-dioic acid is also called:

Oxalic acid

The carboxylic acid can be prepared by the action of Grignard's reagent with:

CO2

The IUPAC name for formic acid is:

Methanoic acid

The reaction of alcohol with acetic acid is known as:

Esterification

Esters are formed by the reaction of carboxylic acids with:

Alcohols

Which one of the following has both hydroxyl and carboxylic acid groups?

Salicyclic acid

Which of the following cannot be prepared directly from acetic acid?

Acetamide

The reaction between caustic soda and fat is called:

Saponification

When a carboxylic acid reacts with alcohol, it produces a new class of compounds:

Esters

Which of the following is α-hydroxy acid?

➡Stearic acid❌ ➡Picric acid❌ ➡Lactic acid✅ ➡Iso-butyric acid❌

Which of the following has the highest solubility in water?

➡Acetic acid✅ ➡n-butyric acid❌ ➡Iso-butyric acid❌ ➡Propionic acid❌

Carboxylic acids do not give the characteristic reactions of:

Alkyl part

Acetic acid shows a molecular mass of 120 when dissolved in benzene. This is because of:

Dimerisation

Which of the following produces violet colour with FeCL3 solution?

Picric acid

Which of the following is present in Vinegar?

Acetic acid

Acetic acid reacts with PCl5 to form:

CH3COCl

The fatty acid which shows the reducing properties is:

Acetic acid

Among the following acids which have the lowest pKa value:

➡CH3CH2COOH❌ ➡HCOOH✅ ➡(CH3)CH-COOH❌ ➡CH3COOH❌

Which of the following is not a dicarboxylic acid?

➡Oxalic acid❌ ➡Malonic acid❌ ➡Adipic acid❌ ➡Valeric acid✅

Which of the following are generally used in the preparation of artificial flavours?

Esters of lower fatty acids

Which of the following will reduce carboxylic acid to 1° alcohol?

LiAlH4

An example of a Zwitter ion is:

Alanine

α-Amino acids behave as crystalline ionic solids and have a high melting point due to the presence of:

Both -NH2 and -COOH group

Which of the following compounds does not have a carboxyl group

Picric acid

Which of the following is the strongest acid?

➡HCOOH✅ ➡C6H5COOH❌ ➡CH3COOH❌ ➡CH3CH2COOH❌

When sodium formate is heated with soda lime, it forms:

CH4

Which is used to remove ink and rust stains on cloth:

Oxalic acid

Vinegar contains:

6 to 10% acetic acid

When acetyl chloride reacts with any amine, the reaction is known as:

Acetylation

Formic acid and acetic acid may be distinguished by reaction with:

Dilute acidic permanganate

Stingers of bees and wasps contain:

Formic acid

The name glacial acetic acid is given to pure acetic acid:

It forms ice like solid below 17°C

Which of the following is used in the baking powder:

Tartaric acid

Acid is obtained as a result reaction between a Grignard reagent and:

CO2

Some amino acids are most important because they are the final product of hydrolysis of peptide bond proteins and they are:

α-amino acid

An amino protein is transferred from one point to the other point and this dipolar ion is called;

Zwitter Ion

Which of the following reaction is/are shown by carboxylic acid?

➡Acid base Reaction ➡Nucleophilic Substitution Reaction ➡Reaction involving carboxyl group as a whole

Which of the following ester give the flavour of jasmine:

Benzyl Acetate

The dilute solution of ___ is called vinegar.

Acetic acid

An organic compound containing both amine and carboxyl groups is known as;

Amino acid

The order of acid strength is:

CClCOOH> CHCl2COOH> CH2ClCOOH> CH3COOH

Methyl cyanides, on boiling with mineral acids or alkalies yield:

Acetic acid

The formation of ester form acetic acid in presence of acid and ethanol is:

Nucleophilic substitution reaction

Complete reduction of carboxylic acids to alkanes is carried out with;

HI/P

Consider the following reaction: CH3COOH + Mg (metal) ➡? What product will form?

Magnesium acetate

Which of the following compounds, in the form of an aqueous solution, on reaction with sodium carbonate will produce carbon dioxide gas?

H3C2-CO-OH

CH3COOH + PCl5➡?. The products of the above reaction are:

CH3COCl + POCl3 HCl

Carboxylic acids are rather hard to reduce, which powerful reducing agent can be used to convert them to the corresponding primary alcohol:

LiAlH4

CH3COOH + CH3CH2OH ➡CH3COOC2H5 + H2O; Which one of the following will act as a catalyst in the above reaction?

H2SO4

Which one of the following reactions of a carboxylic acid is reversible?

Esterification

Acetamide is formed by dehydration of:

Ammonium acetate

When ethanoyl chloride reacts with methylamine, an amide is formed. What is the structure of the amide formed?

H3C-CO-NHCH3

Ethyl butyrate and butyl butanoate are esters with the flavour are:

Pineapple

Which product is obtained by the reaction of a carboxylic acid with alcohol?

Ester

The nature of amino acid 'lysine' is;

Basic

Which of the following has an amino R-group?

Lysine

At an intermediate value of pH, amino acids form Zwitter ions containing:

-NH₃+ and COO-

In basic conditions, amino acid exists in one of the following forms:

H2N-CH2-COO-

The amno acids largely exist in dipolar ionic form:

Alpha amino acids

α-amino acids are compounds having carboxylic acid as well as amino functional groups attached to:

Same carbon atom

The formula of 'Zwitter ion' is represented as;

H3N+-CHR-CO2-

The amino acids which are not prepared in the human body are called:

Essential amino acids

Indicate the cyclic amino acid from the following:

Proline

At low pH or in acidic condition amino acid exists as:

Cation

Which one of the following reagents is used for the identification of amino acids?

Ninhydrin

Which one of the following amino acids is basic in nature?

Lysine

Which one of the following is also called the silver mirror test?

Tollen's Reagent

In the formation of the Zwitter ion which one of the following donates the proton?

COOH

Which one of the following is the simplest amino acid?

Glycine

When acid is added to an amino acid, which one of the following will act as a base?

COO-

Which one of the following is not carboxylic acid?

CnH2n+1Oh

Pentanoic acid is:

Valeric acid

Which one is not fatty acid

Phthalic acid

Isobutyric acid is also written as:

2-Methylpropanoic acid

Which of the following compound cannot be oxidized to carboxylic acid by the mild oxidizing agent

Ethanol

Hybridization of functional carbon changes from ____ to ____ when converting to carboxylic from formyl

sp2 ➡ sp2

Ethyl cyanide boiled with HCl in the presence of water gives:

Propanoic acid

A molecule is oxidized to simple aliphatic carboxylic acid if the molecule gives a silver mirror but does not have an acid, identify the molecule

Propanal

Hydrolysis of alkane nitriles for preparing carboxylic acids requires:

➡Acidic Conditions ➡Alkaline Conditions

IUPAC name of CH3CN is:

Ethane Nitrile

R-X + KCN ➡R-CN + KX is an example of:

Nucleophilic substitution Reaction

Carboxylic acid decomposes bicarbonates with

Effervescence

Ethyl alcohol reacts with which to give a product having pineapple flavour:

Butyric acid

Which one is benzyl acetate:

CH3COOCH2C6H5

Esterification is a reaction:

Condensation

Which of the following do not give acetamide when react with ammonia:

Alkyl Nitrile

Which one doesn't convert carboxylic acid to acid halide:

Cl2

During the formation of an ester from acetic acid, what actually happens:

Displacement of the OH- form the acid by OCH3

Carboxylic acid reacts with ammonia to form salt

Ammonium Acetate

Which of the following formula is more reactive for hydrolysis

-COCl

2CH3COOH + Na2CO3➡X + CO2. Identify "X" among the following

Sodium Ethanoate

CH3COONH4➡CH3CONH2 + H2O The above reaction is an example of :

Dehydration

Ester used for banana flavouring is:

Amyl acetate

Which of the following metal does not react with carboxylic acid

IUPAC name of:CH3-CO-NH2

Ethanamide

Pure organic acids are much:

Weaker than chloro substituted acids

Here the strongest acid is:

➡CH3COOH❌ ➡Cl-CH2-COOH✅ ➡CH3CH2COOH❌ ➡Br-CH2-COOH❌

Carboxylic acid when dissolved in H2O produces H3O+ and :

Alkanoate ion

Which of the following can react with NaHCO3:

Ethanoic acid

Which of the following does not contain the COOH group:

Carbolic acid

Which of the following acid is found in the stings of bees and ants:

Formic acid

When a carboxylic acid is protonated, protonation occurs at:

Carbonyl oxygen atom

Which of the following cannot be directly prepared from acetic acid:

Acetamide

The reaction of acetic acid with sodium metal is:

Electrophilic substitution

In glutaric acid HOOC-(CH2)n-COOH, the value of n is equal to:

Which one is most acidic in nature:

Formic acid

The highest melting point is of:

C3H7COOH

The general formula of an aliphatic carboxylic acid is;

CnH2nO2

Only the first four members of aliphatic acids are soluble in water due to:

CnH2nO2

Only the first four members of aliphatic acids are soluble in water due to;

Hydrogen Bonding

The name of compound HOOC9CH2)4COOH is:

Adipic acid

Carboxylic acid are converted in respective alkanes in the presence of;

HI/P

Which of the following compound will convert acetic acid to acetyl chloride:

PCl5

Acetic acid undergoes reduction with LiAlH4 to give:

Ethanol

Ethanoic acid reacts with ethanol to give:

Ethyl acetate

What is obtained if n-propyl acetate is boiled with aqueous sodium hydroxide

C3H7OH

Which of the following is a cyclic carboxylic acid:

Phthalic acid

If amyl butyrate is added to a liquid, it will develop a flavour of :

Apricot

Which of the following is not carboxylic acid?

CnH2n+1Oh

If the methyl group of propane is replaced by a carboxylic resulting molecule is:

Malonic acid

Which of the following is an unsaturated aliphatic organic acid

Malic acid

Pentanoic acid is;

Valeric acid

Which one is a carboxylic acid

Palmitic acid

Which one is not fatty acid

Phthalic acid

Organic acid which cannot be obtained by hydrolysis of ats:

Succinic acid

Isobutyric acid is also written as:

2-Methylpropanoic acid

The compound that was first isolated by red ants;

Formic acid

By oxidation of which compound carboxylic acid cannot be obtained

2-Methyl, 2-Propanol

Which of the following compound cannot be oxidized to carboxylic acid by the mild oxidizing agent

Propanone

A compound oxidized to x, by further oxidation o x if the resulting compound is butyric acid, starting compound can be;

Butanol

Alkane nitriles on boiling with which type of acid gives organic acids:

Mineral

Hybridization of functional carbon changes from _____ to _____ when converting to carboxylic.

sp ➡sp2

Metallic cyanides give alkyl cyanides in the presence of:

Base

Gas released by acid hydrolysis of alkyl nitriles;

Ethyl cyanide boiled with HCl in the presence of water gives:

Propanoic acid

Which member from simple, primary alkyl halides give butyric acid by acid hydrolysis

3rd

Oxidation of 2-Pentanone by strong oxidizing agents gives:

Propanoic acid, Ethanoic acid

Which member form simple, primary alkyl halides give butyric acid by acid hydrolysis:

3rd

Oxidation of 2-Pentaone by strong oxidizing agents gives:

➡Ethanoic acid ➡Propanoic acid (Cleavage of the ketonic group from that side of carbonyl which contains a higher number of hydrogen atoms)

A molecule is oxidized to simple aliphatic carboxylic acid if the molecule gives a silver mirror but does not behave as an acid, identify the molecule

Propanol

Which metal does not release hydrogen gas from valeric acid

Potassium carbonate decomposed by acetic acid release gas, the nature of gas is;

Neutral

Which of the following cannot show the acidic nature of carboxylic acids

➡Alkali metals ➡Alkaline Earth metals ➡Alkali metal carbonates

Carboxylic acid decomposes bicarbonates with;

Effervescence

Which group of carboxylic acids is active for the reaction alkali carboantes:

H-atom

Which reaction can be used in artificial juices formation with carboxylic acids:

Esterification

The addition of ethyl alcohol in protonated acetic acid is:

Nucleophilic

Ethyl alcohol reacts with which to give a product having pineapple flavour:

Butyric acid

Which one is benzyl acetate:

C6H5CH2COOH3

Benzyl alcohol and acetic acid give a compound with ___ fragrance

Jasmine

Esterification is a reaction:

Condensation

Ammonium acetate converts to acetamide by

➡Dehyrdation ➡Heating

Which of the following represents acid amide:

CH3CONH2

Carboxylic acid derivative having least reactive is:

Acid Amide

Which sequence of groups replaces OH of a carboxylic acid with halides, esters and amides respectively?

➡X ➡OR ➡NH2

Which one doesn't convert to acid halide:

Cl2

Which gas is released during acid halide formation with the help of thionyl chloride:

SO2

Which factor decreases the strength of carboxylic acid:

Branching

The strongest acid among the following is;

➡CH3CH2COOH❌ ➡CH3CCl2COOH✅ ➡CH3CHClCOOH❌ ➡CH3CH(NH2)COOH❌

Acetic acid can be prepared by ethanol under:

Oxidizing conditions

Ethanoic acid manufactured through ethanol involves the use of:

Acidified potassium dichromate

If ethanoic acid is to be prepared by hydrolysis of alkane nitriles, which of the following can be the reagent to be hydrolyzed

CH3CN

Hydrolysis of alkane nitriles for preparing carboxylic acids requires:

Acidic Conditions

Hydrolysis of CH3CH2CN will synthesize:

Propanoic acid

The production of acid amide involves the reaction of ethanoic acid with:

Ammonia

Which of the following can be the reagent to produce acetyl chloride from ethanoic acid:

➡Thionyl Chloride ➡NaCl

During the formation of an acetyl chloride from ethanoic acid, what actually happens:

Attachment of Cl with the carbonyl carbon

During the formation of an ester from acetic acid, what actually happens:

Displacement of the OH from the acid by NH2

During the formation of an acid amide from ethanoic acid, what actually happens:

Displacement of the OH- from the acid by OCH3

The stronger acid among the following is:

➡Cl3CCOOH✅ ➡Cl2CHCOOH❌ ➡ClCH2COOH❌ ➡CH3COOH❌

If NaOH is added to an unknown organic compound and the reaction evolves into ammonia, then this unknown organic compound is most likely to:

A carboxylic acid

Organic acids are considered as;

Weak acids

The strength of the organic acids and chloro substituted acids is measured by the pKa scale such that a smaller value of pKa corresponds to:

Stronger acid

Alkane nitriles can be prepared by treating alkyl halide with:

Potassium Cyanide

Ethanoic acid can be prepared by hydrolysis of:

Methane nitrile

Carboxylic acids react with active metals to form their sal;

H2 gas

Which pair can be used as a reactant for the preparation of acetyl chloride:

➡CH3COOH, SOCl2 ➡CH3COOH, PCl5

For producing a carboxylic acid derivative. The addition of a nucleophile to the carboxyl group is always followed by displacement of:

H atom

Which statement is incorrect about the formation of ester

➡When carboxylic acids are heated with alcohols esters are formed❌ ➡Esters have a fruity smell❌ ➡Esters are used as artificial sweeteners❌ ➡Ester are formed in the presence of NaOH✅

Carboxylic acid reacts with ammonia to form salt

Acetic anhydride

Which ester s used as orange flavour:

Benzyl acetate

Propanoic acid is produced from ___ on acid hydrolysis

Ethyl cyanide

Esters are

Neutral

Here the strongest acid is:

Cl-CH2-COOH

Which of the following formula is more reactive for hydrolysis:

-COCl

The work on concentrated H2SO4 in the esterification process is as:

Catalyst

The solubility of carboxylic acid in water gradually decreases with:

Increase in the molecular mass

Acetyl chloride is soluble in which solvent

➡Acetone ➡Ether

The acidic character of amino acids is due to:

Amino group

The amino acids that are synthesized within our body naturally are called:

Non-Essential amino acids

Which of the following will produce CO2 while reacting with sodium carbonate:

Carboyxlic acid

When a carboxylic acid is protonated, protonation occurs at:

Carbonyl oxygen atom

Which one is more acidic in nature:

Formic acid

Ethanoic acid reacts with ethanol in the presence o H2SO4 to give:

Ethyl ethanoate

Formation of ethanoyl chloride from ethanoic acid is an example of:

Nucelophilic substituton

The IUPAC name of phthalic acid is:

1,2-benzenedcarboxylic acid

-COOH is reduced to -CH3 in the presence of:

HI/P

Acetic acid exist as cyclic dimer in benzene due to ___ with ___ atoms in the ring.

➡Hydrogen Bonding ➡Eight

Weaker acid among the following is:

ICH2COOH

The reacton of carboxylic acid with sodium metal to form salt with evolution of H2 gas. t is an example of:

Electrophilic Substituton

Ethanoic acid reacts with all of these to produce water except:

Sodium

Carboxylic acid can be prepared by the action of Grignard's Reagent with:

CO2

In the presence of hot alkaline potassium permanganate solution 2-butene will give:

Two moles of ethanoic acid

Velaric acid is obtained from a herb velarian, its IUPAC name is:

Pentanoic acid

The process of acid hydrolysis may be used to obtain:

Pentanoic acid

The process of acid hydrolysis may be used to obtain:

Amino acid from proteins

Ammonia on reaction with acetic acid followed by heating gives:

Acetamide

Ethane nitrile undergoes acid-hydrolysis to give:

Propanoic acd

X an Y combined to gve ompound Z. Orgnaic compounds X,Y and Z can be?

X➡ Alcohol Y➡ Acid Z➡ Ester

Aromatic carboxylic acid can be prepared by the oxidation of alkyl benzene, when treated with:

➡Alkaline KMnO4 ➡Acidic K2Cr2O7 ➡Dilute HNO3

In esterification reaction which bond for RCOOH breaks while reaction with alcohol:

C-H

The general formula of aliphatic carboxylic acid is:

CnH2nO2

Amyl butyrate will develop a flavor of:

Apricot

The reacton of carboxylic acid with alcohol in the presence of H2SO4 is the example of ____ reaction.

Nucleophilic Substitution

Number of oxygen atoms present in cyclic dimer of acetic acid.

Which of the following gives electrophilic substitution reaction with carboxylic acid

➡Na ➡NaOH

Which of teh following is the strongest acid?

Cl3CCOOh

Identify the correct order of acidic strength:

Carboxylic acid > Phenol> Water> Alcohol

Which oen is aliphatic dicarboxylci acid:

Oxalic acid

When ethanoic acid reacts with PCl5, the products formed are;

CH3COCl + POCl3 + HCl

Which of the following is not a fat acid

Benzoic Acid

The boiling points of carboxylic acids are ____ than their corresponding alkanes.

High due to hydrogen bonding

Carboxylic acids are dehydrated on heating strongly in the presence of phosphorus pentoxide product will be;

Acid Anhydride

Which of the folloiwng is the weakest acid?

➡CH3COOH✅ ➡ClCH2COOH❌ ➡Cl2CHCOOH❌ ➡Cl3COOH❌

Which of the following acids cannot be prepared directly from carboxylic acid?

Acid Amide

All of the following methods are used to prepare acid anhydride?

Dehydration of carboxylic acid with P2O5

Which one of the following organic acids is the most reactive and the strongest acid?

➡HCOOH

Which of the followign halosubstituted carboxylic acids is the strgonest acid?

FCH2COOH

➡X: Alcohol ➡Y: Acetic Acid ➡Z: Ester

All of the following are optically active α-amino acids EXCEPT:

➡Glycine✅ ➡Aspartic acid❌ ➡Valine❌ ➡Alanine❌

When an alkali is added to solution of α-amino acids, ___ releases the proton. Therefore, the acidic character is due to?

-NH3+

α-amino acids are required for the synthesis of proteins. These α-amino acids are sub-classified according to how the properties of other functional groups in the side chain (R-group) influence the system. Which of the following is not justified class of α-amino acid under the given condition:

Acidic (side chain e.g. HCl)

All of the following are uses of ethanoic acid EXCEPT:

➡ Used as coagulant for latex in rubber industry❌ ➡Used as a local irritant in medicine❌ ➡Used in the manufacture of pickles❌ ➡Used as an antiseptic in nasal infection ✅

Which of the followings has comaparatively less acidic character

Ethanol

Which reaction does not produce benzoic acid

➡By hydrolysis of C6H5CO2C2H5❌ ➡By hydrolysis of C6H5CN❌ ➡By oxidation of toluene❌ ➡By oxidation of phenol ✅

Which class of organic compounds is used for artificial flavorings in jams?

Ester

Which of the followign compounds would react readily with NaOH?

RCOOH

Amino acids have all of the following porperties EXCEPT:

➡They are colorless, crystalline solids❌ ➡They have low melting points✅ ➡They are soluble in water❌ ➡They behave like salts rather than simple amides and carboxylic acid❌

Which of the followign carboxylic acids is prepared by acid hydrolysis of ethane nitrile?

Ethanoic acid

Mark the incorrect statemnet about α-amino acids:

➡They all have chiral carbon except glycine❌ ➡They are all L-amino acids❌ ➡10 amino acids are called non-essential or dispensable amino acids❌ ➡Polypeptides act as acid only ✅

Which of the following methods is used to prepare amines (mixture of amines) on the commercial scale?

Hofmann's Method

Dehydration of an acid amide gives:

Cyanide

Hoffmann's bromamide reaction is used to prepare __- amine from amides.

1°

For which of the following type of amines carbylamine test gives positive reaction:

Primary Amine

The correct order of basic nature of the following: CH3NH2, (CH3)2NH, (CH3)3N and NH3 is:

(CH3)2NH> CH3NH2> (CH3)3N> NH3

Reaction of ethanoc acdi with ammonia gives;

Ethane amide

Which of the following compounds is expected to be strongest base?

Ethylamine

Which of the following types of isomerism is not shown by aliphatic amines?

Tautomerism

Which of the following derivatives of carboxylic acid is the most reactive?

Acid Halide

In which of the following reactions acid chloride produces aldehyde?

Reaction with H2

Which of the following method is/are not used to prepare priamry amines?

By the reacton of Grignard reagent with NH3

On the acid hydrolysis of acid amide, which of the following product is obtained;

Carboxylic acid

Which of the following derivatives of carboxylic acid is least reactive?

Acid amide

The reacton of carboxylic acids with alcohols n presence of conc. H2SO4 is called;

Esterificaton

Which one of the following given the correct order of acid strength (strongest first) for ethanoic acid, chloroethanoic acid and phenol?

CH2ClCO2H> CH3CO2H> C6H5OH

Acetic acid can be prodcued by the reaction of "A" with CH3CL followed by acid hydrolysis. The "A" is;

KCN

2-Butene heated with alkaline or acidic KMnO4 forms ____

Ethanoic acid

Carboxylic acid reacts with sodium hydroxide to fomr salt, belong to _____ reaction.

Electrophilic Substitution

Propanoic acid liberates CO2 from Na2CO3. The carbon of CO2 comes from:

Carbonate ion

Which of teh followin is not a fatty acid?

Oxalic acid

The reaction of carboxylic acid in which hydrogen atom of carboxyl group is involved

Reaction with Na metal

The pure acetic acid freezes to an ice like solid at:

298

Which of the following is strongest acid

Methanoic acid

Which of the following is the weakest acid:

Acetic acid

Select the carboxylic acid which has differnet smell from others;

Butyric acid

The correct order of decreasing acid strength of A=trichloroacetic acid, B =dichloroacetic acid, C = chloroacetic acid and D = acetic acid is

A> B> C> D

Ethane nitrile on boiling with mineral acids or alkalies yields corresponding

Ethanoic acid

How many grams of sodium metal are used with ethanoic acid to form one moel of H2 gas

Propanoic acid on reduction with HI and red phosphorus gives:

Propane

The alkyl group present in an ester having raspberry flavor is:

Isobutyl

The reducing agent for reduction of an ester is;

LiAlH4

The organic acid which ahs almost same boiling point as water as at standard pressure is

HCOOH

On complete reduction of CH3-COOH. The underlined group after reduction changes into;

-CH3

Acetic acid is miscible with all proportions in:

➡Water ➡Alcohol ➡Ether

The number of carbon atoms involved in a dimer molecule of acetic acid are;

Propanedioic acid is the IUPAC name of:

Malonic acid

Which of the following derivative of carboxylic acid is more reactive.

Acetyl Chloride

The dilute solution of ___ is called vinegar

Acetic acid

Ammonia on eraction with acetic acid followed by heating gives;

Acetamide

Propane nitrile undergoes acid-hydrolysis to give:

Propanoic acid

Carboxylic acid on reaction with LiAlH4 are reduced to;

Alcohol

Reaction of CH3COOH with PCl5 is an example of ___ reaction.

Nucleophilic substitution

___ cannot be prepared directly from acetic acid

Acetamide

C2H5OH + CH3COOH CH3COOC2H5 + H2O Which of the following catalyst is used in the above reaction

Conc. H2SO4

Which of the followign compounds will react with NaOH, Na2CO3 and PCl5

CH3COOH

Compounds having -C≡N group are called;

Nitriles

Acetamide is prepared by:

Heating ammonium acetate

An aqueous solution of an organic compound reacts with sodium carbonate to produce carbon dioxide gas. Which one of the following could be the organic compound?

CH3-CH2-COOH

A food chemist wants to create the odour of pineapple for a product. An ester with this odour has the formula C3H7CO2C2H5. The reactants are

➡C2H5OH ➡C3H7CO2H

C17H35COO-Na+ s sodium salt of fatty acid, its solubility is:

Higher than fatty acid

C6H5COOH is the chemical formula of:

Benzoic acid

Which of the following has maximum number of carbon atoms:

➡Succinic acid❌ ➡Adipic acid✅ ➡Oxalic acid❌ ➡Malonic acid❌

The number of atoms present in the ring of dimer of acetic acid in benzene solvent are;

Which one is aliphatic dicarboxylic acid:

Oxalic acid

The solution of which acid is used for seasoning of food:

Acetic acid

Which of the following will give positive bromine water test:

Maleic acid (Maleic acid have double bond)

Ammonium acetate on strong heating gives:

Acetatamide

Banana flavor is given by:

Amylacetate

The dehydration of the carboxylic acids in the presence of P2O5 and strong heating yields:

Anhydride

Which of the following is fatty acid:

➡Formic acid ➡Palmitic acid ➡Stearic acid

Which of the following is most acidic in nature:

Nitroacetic acid

The highest melting point is of:

C3H7COOH

Which of the following will give acetic acid on acid hydrolysis:

CH3CN

Which of the following is a cyclic carboxylic acid:

Phthalic acid

Carboxylic acids are soluble in benzene forming cyclic dimers. The number of carbon atoms in the dimmeric ring are:

Which of the followign is a polyproticacid:

Oxalic acid

Which of the followings is the acetic acid?

CH3COOH

Which of the followings is the malonic acid and also polyprotic acid?

CH2(COOH)2

C15H31COOH is the chemical formula of:

Palmitic acid

C6H4(COOH)2 is the chemical formula of:

Phthalic acid

CH3CH2CHCOOH is the chemical formula of:

➡Butanoic acid ➡Butyric acid ➡Propyl carboxylic acid

A carboxylic acid contains:

Carboxyl Group

Formic acid was first isolated from:

Red ant

Butyric acid was first isolated from:

Butter

Grignard's Reagent gives carboxylic acid with:

CO2

The solubility of carboxylic acids with the increase in the no. of carbons and hydrogens.

Decreases

Even carboxylic acids have ___ melting point than the next lower and higher members having odd carbon atoms:

Higher

Which of the following is the weaker acid?

➡HCl❌ ➡H2SO4❌ ➡CH3COOH✅

2-Butene when heated with alkaline KMnO4 gives:

Carboxylic acid

Glacial acetic acid freezes to ice like solid at:

17°C

Phthalic acid is also called;

1,2-benzenedicarboxylic acid

The carboxylic acids which are liquid with pungent smell have number of carbons

C1-C3

The general ormula of aliphatic carboxylic acid is:

CnH2nO2

Only first four members of aliphatic acids are soluble in water due to:

Hydrogen Bonding

C17H35COO-Na+ is sodium salt of a ____.

Stearic acid

Hydrolysis of alkane nitriles with mineral acids or alkali yields:

Carboxylic acid

Which of following is cannot be directly prepared from acetic acid:

➡Acetamide✅ ➡Acetic anhydride❌ ➡Ethyl acetate❌ ➡Acetyl chloride❌

Acetic acid undergoes reduction with LiAlH4 to give:

Ethanol

What is obtained if n-propyl acetate is boiled with aqueous sodium hydroxide:

C3H7OH

If benzyl acetate is added to a liquid, it will develop a flavour of:

Jasmine

Raspberry flavor is given by:

Isobutylformate

Pineapple flavor is given by:

Ethylbutyrate

Orange flavor is given by:

Octylacetate

Carboxylic acids yields ___ on reaction with alcohols in the presence of conc. H2SO4

Ester

An aqueous solution of an organic compound reacts with Na2CO3 to produce O2 gas. The organic compound is:

CH3-CH2-COOH

Acetamide is prepared by:

Heating CH3COOH4

Organic compounds having fruity smell are;

Esters

The derivative of carboxylic acid is:

➡Acid chloride (CH3COl) ➡Acid amide (CH3CONH2) ➡Ester

2-Hydroxylpropanoic acid is called _____ and 2,3-Dihydroxybutanedioic acid is called___.

➡Lactic acid ➡Tartaric acid

Acetic acid can be manufactured by ___ of carbohydrates.

Fermentation

UNIT#18 CARBOXYLIC ACIDS Flashcards

(456 cards)