ECAT Pre Engineering Chemistry Chapter 24 MCQ Test With Answer

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

Which acid is used in the manufacture of synthetic fibre

• Formic acid A
• Phthalic acid B
• Carbonic acid C
• Acetic acid D

The Zwitter ion is also called

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

Formic acid is obtained when

• Calcium acetate is heated with conc.H₂SO₄ A
• Calcium formate is heated with calcium acetate B
• Glycerol is heated with oxalic acid C
• Acetaldehyde is oxidized with K₂Cr₂O₇and H₂SO₄ D

Sulphonation of benzoic acid produces mainly

• o-Sulphobenzoic acid A
• m-sulohobenzoic acid B
• p-Sulphobenzoic acid C
• o-and p-Sulphobenzoic acid 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

When acetamide is hydrolysed by boiling with acid the product obtained is

• Ethyl amine A
• Ethyl alcohol B
• Acetic acid C
• Acetaldehyde D

If a large number of amino acids (hundreds to thousands) are joined by peptide bonds, the resulting product is called

• Dipeptide A
• Tripeptide B
• Polypeptide C
• None of these D

The human body can synthesize ______ amino acids

• 1 A
• 10 B
• 20 C
• 19 D

The general formula of amino acids is

• 
  A
• 
  B
• 
  C
• 
  D

A carboxylic acid contains:

• A hydroxyl group A
• A carboxyl group B
• A hydroxyle & carboxyl group C
• A carboxyl &aldehyde group D

Acetic acid is obtained when

• Methyl alcohol is oxidized with potassium permanganate A
• Calcium acetate is distilled in the presence of calcium formate B
• Acetaldehyde is oxidized with potassium dichromate and sulphuric acid C
• Glycerol is heated with sulphuric acid D

When a carboxylic acid reacts with alcohol, it produces a new class of compounds

• Ethers A
• Esters B
• Anhydride C
• Amides D

Butyric acid was named from butyrum means:

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

Lower carboxylic acids are soluble in water due to

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

Between CH₃COOH and HCOOH, HCOOH will be

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

Carboxylic acids generally exists in cyclic

• Monomers A
• Dimers B
• Trimers C
• Tetrameter D

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

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

• Elimination Esterification A
• Elimination Isomerisation B
• Oxidation Exterification C
• Oxidation Oxidation D

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

Boiling point of acetic acid is°C:

• 116 A
• 117 B
• 118 C
• 119 D

Optical activity is possible in

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

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

Which are used as essences (flowers)?

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

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

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

Tryosine was isolated from

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

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

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

Boiling point of acetic acid is ^oC

• 116 A
• 117 B
• 118 C
• 119 D