ECAT Pre Engineering Chemistry Chapter 24 MCQ Test With Answer

Aliphatic carboxylic acids have carboxyl group attached to:

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

CH₃CH₂COOH is also named as:

• Propionic acid A
• Propanoic acid B
• Acetic Acid C
• Both (a) and (b) D

Lactic acid on oxidation by alkaline potassium permanganate gives

• Tartaric acid A
• Pyruvic acid B
• Cinnamic acid C
• Propionic acid D

Tryosine was isolated from

• Butter A
• Cheese B
• Oils C
• Fats D

Which are used as essences (flowers)?

• Aldehydes A
• Ketones B
• Alcohols C
• Esters 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

Etherification is catalyzed by

• Acids A
• Gases B
• Salts C
• None of the these D

General formula of aromatic carboxyl acids

• R---------------OH A
• RCOOH B
• RCOR C
• ARCOOH D

Which is not carboxylic acid with pungent smell?

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

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

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

Aromatic carboxylic acids have carboxyl group attached to group :

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

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

Monocarboxylic acids exist as dimer because of

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

Acetic acid is manufactured by the fermentation of

• Ethanol A
• Methanol B
• Ethanal C
• Methanal D

Active metals react with carboxylic acid releasing gas:

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

Rosenmund's reduction of an acyl chloride gives

• An aldehydes A
• An alcohol B
• An ester C
• A hydrocarbon D

Acetic Acid reacts with PCl₅ giving:

• Acetamid A
• Acetyl chloride B
• Alcohol C
• ether D

Boiling point of acetic acid is°C:

• 116 A
• 117 B
• 118 C
• 119 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

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

Lactic acid on heating with dil. H₂SO₄gives

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

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

In preparation medhod of carboxylic acids from alkyl halides always carboxylic acid formed which have carbon atoms:

• One less than in R----X A
• One more than in R---X B
• Equal to R---X C
• Double to R----X D

Which following derivative cannot be prepared directly from acetic acid?

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

Glutamic acid, aspartic acid are ______ amino acid

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

Fatty acids are:

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

With the increase in carbon no. the solubility of carboxylic acids

• Increases A
• Decreases B
• Remains same C
• None of these D

Acetamide and NaOBr/OH^-produce

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

Formic acid is given names from Latin word a "formic" which means:

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