ECAT Pre Engineering Chemistry Chapter 24 MCQ Test With Answer

Vinegar is dilute solution of:

• Acitic acid A
• Formic acid B
• Butyric acid C
• Propionic acid D

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

Butyric acid was named from butyrum means:

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

Toluene can be oxidized to benzoic acid by

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

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

Formic Acid is obtained from Red out by:

• Distillation A
• Crystallization B
• Filtration C
• sublimation D

Carboxyl group has functional group in it:

• One A
• Two B
• Three C
• Four D

Glacial Acetic acid is

• Pure acetic acid at 100°C A
• Acetic acid mixed with methanol B
• Pure acetic acid at 0°C C
• Pure acetic acid above 16.6°C 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

Amino acids are buildng blocks of:

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

Carboxylic acids are reduced to in presence of NaAIH₄

• Esters A
• Acetyl chloride B
• alcohol C
• Aldehydes D

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

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

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

Hydrolysis of alkyl nitriles gives:

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

Which following derivative cannot be prepared directly from acetic acid?

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

Which compound is both chiral and acidic

• 
  A
• 
  B
• 
  C
• 
  D

Common names of carboxylic acids are given by then:

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

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

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

What will happen if LiAIH₄is added to an ester?

• Two units of alcohol are obtained A
• One unit of alcohol and one unit of acid is obtained B
• Two units of acids are obtained C
• None of these D

With amino acids ninhydrin solution gives

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

Weakest acid among the followings is

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

A compound containing carboxyl group in them are called:

• Ketone A
• Ether B
• Carboxylic acids C
• Polycarboxylic acid D

Lower carboxylic acids are soluble in water due to

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

• di(4-bormophenyl) method A
• Methanol B
• Propan-1-ol C
• Propan-2-ol D

Lactic acid on oxidation by alkaline potassium permanganate gives

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

HCOOH reacts with conc. H₂SO₄to produce

• CO A
• CO₂ B
• NO C
• NO₂ D