ECAT Pre Engineering Chemistry Chapter 22 MCQ Test With Answer

When sodium metal reacts with alcohols

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

Dow's process is used for the preparation of

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

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

Alcohols of low molecular weight are

• Soluble in water A
• Soluble in water on heating B
• Insoluble in water C
• Insoluble in all solvents D

Sodium phenoxide reacts with CO₂at 400 K and 4.7 atm pressure to give

• Sodium salicylate A
• Salicyl aldehyde B
• Catechol C
• Benzoic acid D

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

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

Methanol and ethanol can be distinguished by

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

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

• 3 A
• 4 B
• 5 C
• 6 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

Which is a reagent for Lucas test

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

Alcohols reacts with Grignard reagent to form

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

The organic compounds which are derivative of hydrocarbons of oxygen are:

• Carbohydrates A
• Phenols B
• Alcohals C
• All of these D

In Lucas test primary alcohol make as oily layer

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

Which compound has the maximum repulsion with water?

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

Na reacts with phenol to produce

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

Rectified spirit contains alcohol about

• 80% A
• 85% B
• 90% C
• 95% D

Which of the following is used as anesthetics

• Alcohol A
• Diethylether B
• Phenol C
• Dimethyl ether D

During dehydration of alcohols to alkenes by heating with conc. H₂SO₄, the initial step is

• Formation of an ester A
• Protonation of alcohol molecule B
• Formation of carbocation C
• Elimination of water D

Phenol was discovered by:

• Hofmann A
• Runge B
• Henderson C
• Bakelite D

The boiling point of glycerol is more than propanal because of

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

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

• 
  A
• 
  B
• 
  C
• 
  D

Diethyl ether is obtained by Williamsons synthesis using

• Ethanol + Na + C₂H₅Br A
• Ethanol + Mg + C₂H₅Br B
• Methanol + Na + CH₃Br C
• Methanol + Mg + CH₃Br D

Glucose in the presence of zymase is converted into

• Alcohol A
• Acid B
• Ethyl alcohol C
• Ketone D

Phenol is also known as

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

Rectified spirit contains alcohol about:

• 80% A
• 85% B
• 90% C
• 95% D

Which is not property in ether:

• Very weak hydogen bonding A
• High b.p B
• Slightly soluble C
• Inflammable D

Ethyl alcohol is industrially prepared from ethylene by

• permanganate oxidation A
• Catalytic reduction B
• Absorbing in H₂SO₄followed by hydrolysis C
• Fermentation D

Alcohals can be distinguished using test:

• Lucas A
• Tollen's B
• Koib's C
• William's D

If an electrophile attacks then ______ bond breaks first

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