ECAT Pre Engineering Chemistry Chapter 24 MCQ Test With Answer

Carboxylic acids on complete reduction in the presence of Hi and red phosphorus gives:

• Esters A
• Alcohols B
• Alkanes C
• Aldehydes D

Carboxylic acids having carboxyl group one is called:

• Mono carboxylic acid A
• Di-carboboxylic acid B
• Tri carboxilic acid C
• Tetra carboxylic acid D

A carboxylic acid with one caboxyl group:

• Monocarboxylic acid A
• Dicarboxylic acid B
• Tricarboxylic acid C
• Polycarboxylic 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 following derivative cannot be prepared directly from acetic acid?

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

The acid showing salt like character in aqueous solution is

• Acetic acid A
• Benzoic acid B
• Formic acid C
• α - Aminoacetic acid D

A compound X has all of the following properties: It is a liquid at room temperature and atmospheric pressure; It does not mix completely with water; It does not decolorise acidified potassium manganate

What could X be

• Ethane A
• Ethanoic acid B
• Ethanol C
• Ethyl ethanoate D

Weakest acid among the followings is

• Acetic acid A
• Phenol B
• Water C
• Acetylene D

Acetic Acid is obtained from:

• Red out A
• Vinegar B
• Butter C
• Milk D

Monocarboxylic acids exist as dimer because of

• Dipole-dipole attraction A
• Hydrogen bonding B
• Van der Waals forces C
• Conhesive forces D

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

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

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

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

Hydrolysis of alkyl nitriles gives:

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

Which are used as essences (flowers)?

• Aldehydes A
• Ketones B
• Alcohols C
• Esters D

Amino acids are buildng blocks of:

• protein A
• Carbohydrates B
• Lipids C
• fats D

The acid present in vinegar is

• CH₃COOH A
• HCI B
• H₂SO₄ C
• HCOOH 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

Ethyl alcohol reacts with acetyl chloride to form

• Ethyl chloride A
• Acetic acid B
• Methyleacetate C
• Ethyleacetate D

Which reagent is used to reduce a carboxylic group to an alcohol?

• H2/Ni A
• H2/Pt B
• NaBH4 C
• LiAIH4 D

HCOOH reacts with conc. H₂SO₄to produce

• CO A
• CO₂ B
• NO C
• NO₂ D

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

Which reagent is used to reduce a carboxylic group to an alcohol

• H₂/Ni A
• H₂/Pt B
• NaBH₄ C
• LiAIH₄ D

Lysine is ______ amino acid

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

General formula of aliphatic carboxylic acids:

• R---OH A
• R----COH B
• R----CO---R C
• RCOOH D

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

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

Two moles of acetic acid are heated with P₂O₅the product formed is

• 2 moles of ethyl alcohol A
• Formic anhydride B
• Acetic anhydride C
• 2 moles of methyl cyanide D

Hydrolysis of trichloromethane with aqueous KOH gives

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

The OH group present in acids may be replaced by CI atom on treatment with

• PCI₅ A
• SOCI₂ B
• Both of them C
• None of the above D

Common names of carboxylic acids are given by then:

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

Boiling point of acetic acid is°C:

• 116 A
• 117 B
• 118 C
• 119 D