ECAT Chemistry Chapter 22 Alcohols, Phenols and Ethers

Alcohols reacts with Grignard reagent to form

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

denaturing of alcohol is done by adding methanol in ethanol:

• 10% A
• 20% B
• 30% C
• 40% D

Oxidation of 2-propanol gives

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

A compound is soluble in conc. H₂SO₄, it does not decolourise bromine in carbon tetrachloride but is oxidized by chromic anhydride in aqueous sulphuric acid within two seconds, turning orange solution to blue, green and then opaque. The original compound is

• Primary alcohol A
• Tertiary alcohol B
• alkene C
• ether D

Alcohol fermentation is brought about by the action of

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

Which is not the enzyme involved in the preparation of ethyl alcohol by fermentation of starch

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

Which compound shows hydrogen bonding

• C₂H₆ A
• C₂H₅CI B
• CH₃- O - CH₃ C
• C₂H₅OH 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 compound is obtained on passing ethanol vapours on heated Al₂O₃?

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

In Lucas test primary alcohol make as oily layer

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

The only alcohol that can be prepared by the indirect hydration of alkene is

• ethyl alcohol A
• propyl alcohol B
• isobutyl alcohol C
• methyl alcohol D

Taste of lower alcohols is:

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

A compound of the formula C₄H₁₀O_{reacts with sodium and undergoes oxidation to give a carbonyl compound which does not reduce Tollen's reagent, the original compound is}

• Diethyl ether A
• n-Butyl alcohol B
• Isobutyl alcohol C
• sec-Butyl alcohol D

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

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

Absolute alcohol is obtained by adding rectified apirit in alcohol:

• Water A
• Na₂CO₃ B
• NaOH C
• CaO D

Which is a reagent for Lucas test

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

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

• Cyclohexene A
• Cyclohexane B
• Benzene C
• Benzyne D

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

When phenol is distilled with zinc dust. It is reduced to

• Benzene A
• Benzaldehyde B
• Toluene C
• Hexanol D

Grignard reagent on reaction with a ketone forms

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

Mild oxidation of glycerol with H₂O₂/FeSO₄gives

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

Which of the following is known as wood spirit

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

Organic acid without a carboxylic acid group is

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

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

Ethylene reacts will 1% cold alkaline KMnO₄to give

• Oxalic acid A
• Acetone B
• Ethylene glycol C
• Formaldehyde D

Ethyl alcohol on oxidation with K₂Cr₂O₇gives

• Acetic acid A
• Acetaldehyde B
• Formaldehyde C
• Formic 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

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

Dow's process is used for the preparation of

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