ECAT Pre Engineering Chemistry Chapter 22 MCQ Test With Answer

3 moles of ethanol react with one mole of phosphorus tribromide to from 3 moles of bromoethane and on mole of X. Which of the following is X?

• H₃PO₄ A
• H₃PO₂ B
• HPO₃ C
• H₃PO₃ D

Which is used as an antifreeze?

• Glycol A
• Ethyl alcohol B
• Water C
• Methanol D

Which compound is called a universal solvent?

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

Which of the following is the most suitable method for removing the traces of water from ethanol?

• Reacting with Na metal A
• Passing dry HCl through it B
• Distilling it C
• Reacting with Mg D

Dow's process is used for the preparation of

• Ester A
• Ethers B
• Alcohols C
• Phenols D

Which compound contains - OH in their molecule

• Alcohol A
• Phenol B
• Alcohol and phenol C
• Ether D

Methyl alcohol is not used

• As a solvent A
• A an anti-freezing agent B
• As a substitute for petrol C
• For denaturing of ethyl alcohol D

In Lucas test teriary alcohol make an oily layer

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

On heating glycerol with conc. Sulphuric acid a compound with unpleasant odour is obtained. The compound is

• Methyl alcohol A
• Formic acid B
• Prop-2-enal C
• Glycerol sulphate D

Williamson's synthesis is used to prepare

• Diethylether A
• Phenolphthalein B
• Hydrogenation C
• Bakelite D

Methyl alcohol is not used:

• As a subsitution for petrol A
• As an anti-freezing agent B
• For denating of ethyle alcohal C
• As a solvent D

When sodium metal reacts with alcohols

• Hydrogen gas evolves A
• Sodium hydroxide is obtained B
• Alcohol is reduced C
• Alcohol is polymerised D

The strongest acid among the following aromatic compound is

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

Alcohol can be denaturated by adding:

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

Which compound will not dissolve in H₂O

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

Phenol gives ---------- Colour with neutral FeCl₃solution

• Violet A
• Green B
• Red C
• Blue D

Scientific study of fermentation was first made by

• Buchner A
• Liebig B
• Biot C
• Pasteur D

Concentration of rectified spirit is:

• 12% A
• 14% B
• 90% C
• 95% D

If an electrophile attacks then ______ bond breaks first

• C - H A
• O - H B
• C - O C
• None of these 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

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

Which compound is more soluble in water

• C₂H₅OH A
• C₆H₅OH B
• CH₃OCH₃ C
• n-hexanol D

Derivative of water is:

• Alcohals A
• Phenols B
• Either C
• Phenol D

Which of the following is known as wood spirit

• Ethyl alcohol A
• Propyl alcohol B
• Methyl alcohol C
• Butyl alcohol D

Ethanol is prepared in Pakistan form fermentation of:

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

Phenol is a weak acid. The correct order of acid strength of carboxylic acid, phenol and alcohol is

• Carboxylic acid > phenol > alcohol A
• Carboxylic acid > alcohol > phenol B
• Phenol > carboxylic acid > alcohol C
• Alcohol > phenol > carboxylic acid D

Na reacts with phenol to produce

• H₂gas A
• Benzene B
• CO₂gas C
• CO gas D

Which compound is more soluble in water

• C₂H₅OH A
• Benzene B
• CH₃OCH₃ C
• Hexane D

Ethyl alcohol prepared during fermentation is pure:

• 20% A
• 10% B
• 11% C
• 12% D

The reaction of aromatic acyl chloride and phenol in the presence of a base NaOH or pyridine is called

• Kolbe's reaction A
• Perkin's reaction B
• Sandmeyer's reaction C
• Schotten Baumann reaction D