ECAT Pre Engineering Chemistry Chapter 22 MCQ Test With Answer

In Lucas test teriary alcohol make an oily layer

• Immediately A
• In 10 mins B
• On heating C
• Not D

Concentration of rectified spirit is:

• 12% A
• 14% B
• 90% C
• 95% D

Which compound is more soluble in water?

• C₂H₅OH A
• C₅H₅OH B
• CH₃OCH₃ C
• n-Hexanol D

Which one is used as a fuel for internal combustion engines in many European countries and Brazil

• C₂H₅OH A
• CH₃OH B
• CH₃COOH C
• C₂H₂ D

Alcohols react with carboxylic acid to produce the class of compounds known as

• Grignard's reagent A
• Esters B
• Amides C
• None of these D

The strongest acid among the following aromatic compound is

• Ortho-nitrophenol A
• Para-chlorophenol B
• Para-nitrophenol C
• Meta-nitrophenol D

Alcohol fermentation is brought about by the action of

• CO₂ A
• O₂ B
• Invertase C
• Yeast D

Either, an organic compound has close resemblance in structure and thus a derivative of:

• Water A
• Oxides of lithium B
• Oxides of magnisium C
• Oxides of aluminium D

• A primary alcohol A
• A secondary alcohol B
• An eher C
• A phenol D

Salol is prepared from

• Salicylic acid and phenol A
• Salicylic acid and methyl alcohol B
• Both C
• None D

Which compound is called a universal solvent?

• H₂O A
• CH₃OH B
• C₂H₅OH C
• CH₃----O---CH₃ D

• 1-bromobutane A
• 2-bromobutane B
• 1-bromo-2-methyl propane C
• 2-bromo-2-methyl propane D

Which one of the following correctly describes the acid properties of phenol

• Stronger than HCI A
• Stronger than carboxylic acid B
• An acid stronger than carbonic acid C
• An acid weaker than carboxylic acid D

Grignard reagent on reaction with a ketone forms

• Tertiary alcohol A
• Secondary alcohol B
• Primary alcohol C
• Carboxylic acid D

Which one is primary alcohol?

• Buten-2-ol A
• Propan-2-ol B
• Butaon-1-ol C
• 2,3-Dimethylhexane-4-ol D

The boiling points of alcohols are higher than the corresponding alkanes, This is because

• Of hydrogen bonding existing between molecules of alcohols A
• Alkanes are dipolar compounds B
• Alcohols are sweet in taste C
• Alcohols are soluble in water D

The reaction of sodium with ethanol gives

• CH₃OH A
• NaH B
• H₂O C
• H₂ D

Methanol and ethanol can be distinguished by

• Iodoform test A
• Iucas test B
• Dichromate/H₂SO₄oxidation test C
• Flame test D

When ethylene glycol is heated with acidified potassium permanganate, the main organic compound obtained is

• Oxalic acid A
• Glyoxal B
• Formic acid C
• Ethanol D

Compound X has molecular formula C₁₀H₁₄O and is unreactive towards mild oxidising agents. What is the structure of the compound formed by dehydration of X

• 
  A
• 
  B
• 
  C
• 
  D

Rectified spirit contains alcohol about

• 80% A
• 85% B
• 90% C
• 95% D

Mild oxidation of glycerol with H₂O₂/FeSO₄gives

• Glyceraldehyde A
• Dihydroxy acetone B
• Glycerose C
• None D

Which compound shows more hydrogen bonding?

• C₂H₆ A
• C₂H₅Cl B
• CH₃----O----CH₃ C
• C₂H₅OH D

The boiling point of glycerol is more than propanal because of

• Hybridisation A
• H-bonding B
• Resonance C
• All these factors D

Phenol is used in the preparation of

• Bakelite A
• Phenatherene B
• Cellulose C
• All of these D

Which more acidic?

• o-cresol A
• p-nitrophenol B
• phenol C
• m-cresol D

Which compound shows hydrogen bonding

• C₂H₆ A
• C₂H₅CI B
• CH₃- O - CH₃ C
• C₂H₅OH D

Which bond shows maximum hydrogen bonding with water?

• CH₃OH A
• C₂H₅OH B
• CH₃----O----CH₃ C
• C₆H₅OH D

Which structure shows a tertiary alcohol

• CH₃CH₂OH A
• (CH₃)₂CHOH B
• (CH₃)₃COH C
• CH₂OH D

Which of the following is produced when an aqueous solution of butan-2-ol is refluxed with dil acidified KMnO₄

• Butanol A
• Butanoic acid B
• Butanone C
• Butane D