ECAT Pre Engineering Chemistry Chapter 24 MCQ Test With Answer

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

HCOOH reacts with conc. H₂SO₄to produce

• CO A
• CO₂ B
• NO C
• NO₂ 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

Lactic acid on heating with dil. H₂SO₄gives

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

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

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

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

Compounds containing cyanide group (.........C=H) are called:

• Nitrides A
• Nitrites B
• Nitriles C
• Cyanides D

Rosenmund's reduction of an acyl chloride gives

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

Between CH₃COOH and HCOOH, HCOOH will be

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

Toluene can be oxidized to benzoic acid by

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

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

The order of decreasing ease of reaction with ammonia is

• Anhydrides, esters, ethers A
• Anhydrides, ethers, esters B
• Ethers, anhydrides, esters C
• Esters, ethers, anhydrides D

When propanamide reacts with Br₂and NaOH then which of the following compounds is formed?

• Ethyl alcohol A
• Propyl alcohol B
• Propyl amine C
• Ethylamine D

Lower carboxylic acids are soluble in water due to

• Low molecular weight A
• Hydrogen bonding B
• Dissociation into ions C
• Easy hydrolysis D

The human body can synthesize ______ amino acids

• 1 A
• 10 B
• 20 C
• 19 D

The reaction of acetaldehyde with HCN followed by hydrolysis gives a product which exhibits

• Metamerism A
• Tautomerism B
• Enatiomerism C
• Geometrical isomerism D

Glacial acetic acid freezes to ice like solid it.

• 07 A
• 17 B
• 27 C
• 37 D

Which is not carboxylic acid with pungent smell?

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

In public urinals, we observe some nascent smell. This smell is due to

• Hydrolysis of urea of urine by urease of atmosphere into NH₃and CO₂ A
• Formation of sulphonic acid by urea of urine B
• Reaction of CO₂of atmosphere with urea monoitrate in urine C
• Hydrogen present in air reacts with nitrogen forming NH₃ D

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

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

A colourless liquid, at room temperature reacts with soda lime to form sodium salt of carboxylic acid and ammonia gas. The liquids is

• Propanamide A
• Propanoic acid B
• Formamide C
• Methyl Ethanoate 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 reagent is used to reduce a carboxylic group to an alcohol?

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

• Ethanol in the presence of concentrated sulphuric acid A
• Potassium hydroxide B
• Sodium C
• Sodium carbonate D

Amylacetate flavour is present in:

• Banana A
• Apple B
• Jasmine C
• Orange 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

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

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

Lactic acid on oxidation by alkaline potassium permanganate gives

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

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

• 07 A
• 17 B
• 27 C
• 37 D