ECAT Pre Engineering Chemistry Chapter 24 MCQ Test With Answer

Which formula represents the organic compound formed by the reaction of propanoic acid with methanol in the presence of concentrated sulphuric acid as a catalyst

• CH₃CH₂COCH₃ A
• CH₃CH₂CO₂CH₃ B
• CH₃CO₂CH₂CH₃ C
• CH₃CH₂CH₂CO₂CH₃ D

Which of the following statements about acetic, anhydride is not correct

• It is immiscible with water but is hydrolysed to give acetic acid A
• It is prepared by the action of actyl chloride on the sodium salt of acetic acid B
• it reacts with ammonia to give acetamide C
• it is a strong acid D

When acetamide reacts with Br₂and caustic soda, then we get

• Acetic acid A
• Bromoacetic acid B
• Methyl amine C
• Ethylamine D

An artificial smell of banana is produced in many articles y using esters which of the following is that

• Amyl acetate A
• Isoamyl valerate B
• Octyl acetate C
• Methyl butyrate D

The human body can synthesize ______ amino acids

• 1 A
• 10 B
• 20 C
• 19 D

Which of the following is present in the stings of bees and wasps

• Formic acid A
• Citric acid B
• Carbolic acid C
• Formalin D

Aspirin is

• Acetyl salicylic acid A
• Phenyl salicylic acid B
• Salicylic acid C
• Benzoic acid D

Which of the following compounds on boiling with KMnO₄(alk) and subsequent acidification will not give benzoic acid?

• Benzyl alcohol A
• Acetophenone B
• Anisole C
• Toluene D

A carboxylic acid contains:

• A hydroxyl group A
• A carboxyl group B
• A hydroxyle & carboxyl group C
• A carboxyl &aldehyde group D

Zwitter ion is ______ ion an amino acid

• Polar A
• Monopular B
• Dipolar C
• Non polar D

Carboxylic acids are more acidic than pehnol and alcohol because of

• Intermolecular hydrogen bonding A
• Formation of dimmers B
• Highly acidic hydrogen C
• Resonance stabilization of their conjugate base D

An organic acdi having molecular formula C₂H₄O₂is

• Formic acid A
• Acetic acid B
• Oxalic acid C
• Propionic acid D

Which are used as essences(flowers)?

• aldehydes A
• Ketones B
• alcohols C
• esters D

When acetic acid and ethanol react together an ester is formed which is called

• Ethyl ester A
• Ethanoic acid B
• Ethanoic acid C
• Ethyl acetate D

A carboxylic acid containing Ar group in it is called:

• Aromatic carboxylic acid A
• Allphatic carboxylic acid B
• Dicarboxylic acid C
• Carboxylic acid D

Esters have peculiar smell, which of the following is used as an essence of orange

• Isoamyl acetate A
• Iosamyl valerate B
• Octyl acetate C
• Methyl butyrate D

Optical activity is possible in

• Oxalic acid A
• Acetic acid B
• Tartaric acid C
• Formic acid D

The organic compounds containing Ph-OH group are called:

• Phenol A
• aldehyde B
• Keton C
• Carboxylic acids D

From the following values of dissociation constants of four acids which value represents the strongest acid?

• 2 x 10^-2 A
• 0.02 x 10^-1 B
• 3 x 10^-4 C
• 2 x 10^-4 D

Boiling point of acetic acid is°C:

• 116 A
• 117 B
• 118 C
• 119 D

Acetamide and NaOBr/OH^-produce

• Ethanamine A
• Methanamide B
• CH₃CN C
• NH₃ D

The M.P. of carboxylic acids containing even number of carbon atoms is ______ than the next

• Higher A
• Low B
• Equal C
• None D

Acetic acid is miscible in:

• Water A
• Alcohol B
• Either C
• All of these D

• 
  A
• 
  B
• 
  C
• 
  D

Hydrolysis of trichloromethane with aqueous KOH gives

• Potassium formate A
• Acetylene B
• Chloral C
• Methanol D

• 
  A
• 
  B
• 
  C
• 
  D

Glacial Acetic acid is

• Pure acetic acid at 100°C A
• Acetic acid mixed with methanol B
• Pure acetic acid at 0°C C
• Pure acetic acid above 16.6°C D

• Acidic amino acid A
• Basic amino acid B
• Neutral amino acid C
• None of these D

Hydrolysis of alkyl nitriles is done to get carboxylic acids in the presence of

• Mineral acids A
• Mineral alkalies B
• Organics acids C
• Minerals acids & alkalies D

Hydrolytic reaction of fats by causic soda is known as

• Acetylation A
• Carboxylation B
• Esterification C
• Saponification D