ECAT Pre Engineering Chemistry Chapter 22 MCQ Test With Answer

Treatment of a secondary alcohol with a suitable oxidizing agent (K₂Cr₂O₇) results in the formation of

• Ketone A
• Aidehyde B
• Ether C
• Alkyl halide D

Phenol is also known as

• Acetic acid A
• Carbolic acid B
• Tararic acid C
• Trichloroacetic acid D

Oxidation of 2-propanol gives

• Propanone A
• Butanone B
• Pentanone C
• None of these D

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

Carbolic acid is the other name for

• Methanol A
• Ethanol B
• Propanol C
• Phenol D

95% alcohol is called

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

which enzyme is not involved in the fermentation of starch ?

• Diastase A
• Zymase B
• Urease C
• Invertase D

Na reacts with phenol to produce

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

Which structure shows a tertiary alcohol

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

Which compound will not dissolve in H₂O

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

The test used for the detection of ethanol in the mouth of a drunk driver is that the drunk driver is asked to blow air from mouth into a solution of K₂Cr₂O₇and H₂SO₄. The colour changes, if the driver is drunk

• From orange to green A
• From pink to green B
• From orange to colorless C
• From pink to colorless 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

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

• 3 A
• 4 B
• 5 C
• 6 D

Hydrolytic coversion of sucrose into glucose and fructose is known as

• Induction A
• Inversion B
• Insertion C
• Inhibition 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

Alcohols are named by replacing 'e' of alkane with:

• al A
• ene B
• ol C
• one D

Which compound has the maximum repulsion with water?

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

Which is a reagent for Lucas test

• ZnCl₂+ Conc. HCl A
• Zn B
• Na C
• Br 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

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

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

Picric acid is

• 2, 4, 6-Trinitrotoluene A
• 2, 4, 6-Tribomoethanol B
• 2, 4,6-Trinitrophenol C
• Para-Nitrophenol D

Ethanol is prepared in Pakistan form fermentation of:

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

Taste of lower alcohols is:

• Sweet A
• Bitter B
• Our C
• Salty D

denaturing of alcohol is done by adding methanol in ethanol:

• 10% A
• 20% B
• 30% C
• 40% D

Alcohols are derivatives of:

• Benzene A
• Alkanes B
• Alkens C
• Alkynes D

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

• 
  A
• 
  B
• 
  C
• 
  D

According to Lewis concept ethers behave as:

• Acid A
• Base B
• Acid as well as a base C
• None of them D

Which of the following groups will increase the acidity of phenol?

• -NO₂ A
• -CN B
• -X (halogens) C
• All D

Propanone is the product obtained by dehydrogenation of

• 2-Propanol A
• 1-Propanol B
• Isobutyl alcohol C
• Propanethoil D

An organic compound 'X' on treatment with acidified K₂Cr₂O₇gives a compound 'Y' which reacts with I₂and sodium carbonate to form Triodomethane. The compound 'X' is

• CH₃OH A
• CH₃CHO B
• CH₃CH(OH)CH₃ C
• CH₃COCH₃ D