ECAT Pre Engineering Chemistry Chapter 24 MCQ Test With Answer

An organic acdi having molecular formula C₂H₄O₂is

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

Fatty acids are:

• Allphatic monocarboxylic acids A
• Dicaroxylic acids B
• Tricarboxylic acids C
• Tetracarboxylic acids D
• Poly carboxylic acids E

Hydrolysis of alkyl nitriles gives:

• alkane A
• alkyl halide B
• alkyl nitride C
• carboxylic acids D

Vinegar made form cane sugar, now a days synthetically contains

• Citric acid A
• Lactic acid B
• Acetic acid C
• Palmitic acid D

What is formed when oxalic acid is dehydrated by conc. H₂SO₄?

• C + CO₂ A
• CO B
• CO₂ C
• CO + CO₂ D

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

Carboxyl group has functional group in it:

• One A
• Two B
• Three C
• Four D

Which of the following alcohols cannot be produced by treatment of aldehydes or ketones with NaBh₄or LiAH₄?

• 1-Propanol A
• 2-Propanol B
• 2-Methyl2-Proponal C
• Ethanol D

Which are used as essences(flowers)?

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

Which is not carboxylic acid with pungent smell?

• Formic acid A
• Acetic acid B
• Ethanoic acid C
• Butyric acid D

Lysine is ______ amino acid

• Acidic A
• Basic B
• Natural C
• None of these D

• It decolourises aqueous bromine rapidly A
• It is insoluble in water B
• It reduces Fehling's reagent C
• Two molecules react with each other in the presence of a strong acid D

Active metals react with carboxylic acid releasing gas:

• CO A
• CO₂ B
• H₂O as steam C
• H₂ 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

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

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

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

• Step 1 Step 2
  HCI HCN
  A
• HcN,NaCH H₂SO₄ B
• H₂SO₄ K₂Cr₂O₇/H₂SO₄ C
• KCN HCI D

Which of the following derivative can not be prepared directly from acetic acid

• Acetamide A
• Acetyl chloride B
• Acetic anhydride C
• Ethyl acetate D

The amino acids which human body can synthesize are called ______ amino acid

• Essential A
• Non essential B
• Acidic C
• Basic D

Which one of the following has been hydroxyl and carboxylic acid groups

• Phenols A
• Picric acid B
• Phthalic acid C
• Salicylic acid D

Common names of carboxylic acids are given by then:

• Source A
• Person discovered B
• place C
• habit D

Aliphatic carboxylic acids have carboxyl group attached to:

• Alkyl group A
• Aryl group B
• Phenyl group C
• Benzyl lgroup D

The Zwitter ion is also called

• International salt A
• Internal salt B
• No salt C
• None of these D

The acid present in vinegar is

• CH₃COOH A
• HCI B
• H₂SO₄ C
• HCOOH D

Aspirin is

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

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

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

Essential amino acids are those amino acids which

• Body can not synthesize A
• Body can synthesize B
• α-amino acids C
• β-amino acids 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

Zwitter ion is ______ ion an amino acid

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