ECAT Pre Engineering Chemistry Chapter 22 MCQ Test With Answer

The hydroxyl derivatives of aromatic hydrocarbons which have the -OH group directly bonded to the ring C-atom are called

• Alcohols A
• Ketones B
• Esters C
• Phenols 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

• Aqueous bromine A
• Dilute HNO₃ B
• Dilute HCI C
• CH₃COCI 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

95% alcohol is called

• Rectified spirit A
• Spirit of wine B
• Spirit C
• Methylated D

How many alcohol (including both structural isomers and stereoisomers) can have the molecular formula C₄H₁₀O

• 3 A
• 4 B
• 5 C
• 6 D

Phenol is more readily soluble in

• Dil. HCl A
• Both NaOH and HCl B
• NaOH sol C
• Sodium bicarbonate solution D

Nitration of phenol gives

• o-nitrophenol A
• p-nitrophenol B
• m-nitrophenol C
• Both o and p-nitrophenol D

Which compound will not dissolve in H₂O

• C₆H₆ A
• C₂H₅OH B
• CH₃CH₂CH₂OH C
• CH₃- OH D

Which compound is more soluble in water?

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

The reaction of sodium with ethanol gives

• CH₃OH A
• NaH B
• H₂O C
• H₂ D

Which structure shows a tertiary alcohol

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

Grignard reagent on reaction with a ketone forms

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

The organic compounds which derivative of hydrocarbons due to oxygen is:

• Phenol A
• Alcohol B
• Alkyl halide C
• Either D

Which of the following cannot be produced by acidic dehydration of alcohols?

• Ethers A
• Aldehyde B
• Alkyl Hydrogen sulphate C
• Alkene D

Ethyl alcohol prepared during fermentation is pure:

• 20% A
• 10% B
• 11% C
• 12% D

Which of the following compound is obtained on passing ethanol vapours on heated Al₂O₃?

• Ethylether A
• Acetone B
• Ethane C
• Ethanol D

Ethanol containing some methanol is called

• Absolute spirit A
• Rectified spirit B
• Power alcohol C
• Methylated spirit D

Which isomers of C₅H₁₁OH gives, on dehydration, the greatest number of different alkenes

• 
  A
• 
  B
• 
  C
• 
  D

When phenol is reduced in the presence of Zn dust, we get

• Cyclohexene A
• Cyclohexane B
• Benzene C
• Benzyne 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

Industrial alcohol may be denaturated by the addition of

• Methyl alcohol A
• Acetone B
• Pyridine C
• Any of the above reagent D

Alcohols reacts with Grignard reagent to form

• Alkanes A
• Alkenes B
• Alkynes C
• All D

Alcohol can be denaturated by adding:

• Acetone A
• Methanol B
• Pyridine C
• All D

Organic acid without a carboxylic acid group is

• Ascorbic acid A
• Vinegar B
• Oxalic acid C
• Picric acid D

Which of the following statements is correct?

• Phenol is less acidic than ethyl alcohol A
• Phenol is more acidic than ethanol B
• Phenol is more acidic than carbonic acid C
• Phenol is more acidic than CH₃COOH D

General formula of alcohol is:

• ROH A
• Ar-OH B
• R-O-R C
• Ph-OH D

Rectified spirit contains alcohol about

• 80% A
• 85% B
• 90% C
• 95% D

Ethanol is prepared in Pakistan form fermentation of:

• Starch A
• Sugar B
• Glucose C
• Molasses D

C₂H₅OH can be differentiated from CH₃OH by

• Reaction with HCl A
• Reaction with NH₃ B
• Iodoform test C
• Solubility in water D