ECAT Pre Engineering Chemistry Chapter 24 MCQ Test With Answer

Pro stand for

• Valine A
• Alamine B
• Glycine C
• Proline 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

Between CH₃COOH and HCOOH, HCOOH will be

• Less acidic A
• Equally acidic B
• More acidic C
• None D

Acetic acid is obtained when

• Methyl alcohol is oxidized with potassium permanganate A
• Calcium acetate is distilled in the presence of calcium formate B
• Acetaldehyde is oxidized with potassium dichromate and sulphuric acid C
• Glycerol is heated with sulphuric acid D

Glacial acetic acid freezes to ice like solid at (°C)

• 07 A
• 17 B
• 27 C
• 37 D

Of the following four reactions, formic acid and acetic acid differ in which respect?

• Replacement of hydrogen by sodium A
• Formation of ester with alcohol B
• Reduction of Fehling solution C
• Blue litmus reaction D

Acetic acid is miscible in:

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

• 
  A
• 
  B
• 
  C
• 
  D

Which of the following is not a fatty acid?

• Propanoic acid A
• Acetic acid B
• Phthalic acid C
• Butanoic acid D

Which acid is used in the manufacture of synthetic fibre?

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

Glutamic acid, aspartic acid are ______ amino acid

• Acidic A
• Basic B
• Neutral C
• None of these 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

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

• Proton donar A
• Dehydrating agent B
• Catalyst C
• Electrophile D

Which of the following order is incorrect w.r.t property indicated?

• Formic acid > Acetic acid > Propionic acid (ACID STRENGTH) A
• Cyclohexanol < Phenol < Benzoic acid ( ACID STRENGTH) B
• Benzamide < Aniline < Cyclohexylamine ( ACID STRENGTH) C
• FCH₂COOH > CICH₂COOH > BrCH₂COOH (ACID STRENGTH) D

Carboxylic acids on complete reduction in the presence of HI and red Phosphours gives:

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

If a large number of amino acids (hundreds to thousands) are joined by peptide bonds, the resulting product is called

• Dipeptide A
• Tripeptide B
• Polypeptide C
• None of these D

Active metals react with carboxylic acid releasing gas:

• CO A
• CO₂ B
• H₂O as steam C
• H₂ D

The acids obtained by the hydrolysis of fats and oils are called

• Active compound A
• Fatty acids B
• Functional group C
• None D

• Alkyl A
• Alkyl nitrile B
• Cyanogens C
• Amine D

The solution of which acid is used for seasoning of food

• Formic acid A
• Acetic acid B
• Benzoic acid C
• Butanoic acid D

When hydrogen cyanide is added to an Aldehyde in the presence of ammonia it is called

• Strecker synthesis A
• Cory house synthesis B
• Williamson;s synthesis C
• None of these D

Which are used as essences(flowers)?

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

Lactic acid on heating with dil. H₂SO₄gives

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

With amino acids ninhydrin solution gives

• Blue A
• Violet B
• Bluish violet C
• White D

Boiling point of acetic acid is ^oC

• 116 A
• 117 B
• 118 C
• 119 D

Carboxylic acids react with acids releasing gas from it:

• H2O as steam A
• CO B
• CO2 C
• O2 D

Easter are pleasant smelling compounds. Which ester posseses odour like pineapple

• Amylacetate A
• Amylbutyrate B
• Ethylbutyrate C
• Benzylacetate D

Toluene can be oxidized to benzoic acid by

• KMnO₄(alk) A
• K₂Cr₂O₇(acidic) B
• Both C
• None D