laboursonline – MCQs, Mock Tests | IIT JEE IIT JEE Alcohols And Phenols

Amongst the following the maximum boiling point is of

1. 2-butanol
2. 1-butanol
3. 2-methanol
4. 2-methyl-1-propanol

✅ Correct Answer: 1

Primary alcohols can be prepared from alkenes by

1. mercuration and demercuration of alkenes
2. direct hydration of alkenes
3. diboration of alkenes
4. All the above

✅ Correct Answer: 3

Secondary alcohol can be prepared from Grignard reagent by reacting Grignard reagent with

1. ethoxyethane
2. methanal
3. propanal
4. facetaldehyde

✅ Correct Answer: 3

ou are provided with a mixture of ortho meta and paranitrophenols. On steam distillation the component obtained will beo-

1. o-nitrophenol
2. p-nitrophenol
3. m-nitrophenol
4. a mixture of A and B

✅ Correct Answer: 1

Carbinol is

1. 1-butanol
2. ethyl alcohol
3. 2-propanol
4. methyl alcohol

✅ Correct Answer: 4

Vapours of isobutyl alcohol when passed over heated copper gives

1. 2 methyl propanal
2. 2 ethyl propane
3. butanone
4. butanal

✅ Correct Answer: 2

The source of sugar for wine is

1. grapes
2. apples
3. methane
4. orange

✅ Correct Answer: 1

Proof spirit is aqueous ethyl alcohol containing??..by volume of alcohol.

1. 67.10%
2. 27.50%
3. 57.10%
4. 99%

✅ Correct Answer: 3

Which of the following is used in the manufacture of bakelite?

1. formaldehyde
2. Phenol
3. Ethyl alcohol
4. Both A and B

✅ Correct Answer: 4

Alcohols are isomeric with

1. ethers
2. esters
3. carbonylic acids
4. aldehydes

✅ Correct Answer: 1

Which of the following resist oxidation under ordinary conditions?

1. Isobutyl alcohol
2. Sec. butyl alcohol
3. Tert. butyl alcohol
4. None of above

✅ Correct Answer: 3

Propene on treatment with dil. sulphuric acid givesNone of above

1. 1-propanol
2. 2-propanol
3. A and B
4. None of above

✅ Correct Answer: 2

As the alkyl part goes on increasing in alcohol the solubility of alcohol in water

1. may increase or decrease
2. goes on increasing
3. remains constant
4. decreases

✅ Correct Answer: 4

Reduction of which of the following will give only ethyl alcohol?

1. propyl methanoate
2. methyl methanoate
3. formic acid
4. ethyl acetate

✅ Correct Answer: 4

Power alcohol is absolute alcohol blended with petrol in the ratio of

1. 15%
2. 35%
3. 20%
4. 25%

✅ Correct Answer: 3

Which will have the maximum solubility in water?

1. Tert. butyl alcohol
2. Isobutyl alcohol
3. Methanol
4. 1 butanol

✅ Correct Answer: 4

Cane sugar on hydrolysis gives

1. galactose and sucrose
2. fructose only
3. glucose only
4. glucose and fructose

✅ Correct Answer: 4

Methyl alcohol can be obtained from

1. coal gas
2. charcoal
3. producer gas
4. water gas

✅ Correct Answer: 4

Alcohols have higher boiling point than alkanes of the corresponding molecular mass because

1. alcohols are miscible with water
2. alcohols have hydrogen bond
3. alcohols have ionic bond
4. alcohols contains OH group

✅ Correct Answer: 2

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

1. methyl alcohol
2. isobutyl alcohol
3. propyl alcohol
4. ethyl alcohol

✅ Correct Answer: 4

Nobels oil is

1. dinitro glycerine
2. trinitroglycol
3. glycerol trinitrate
4. glycerol

✅ Correct Answer: 3

Pyroligenous acid is obtained by the destructive distillation of

1. coal
2. petroleum
3. wood
4. gasoline

✅ Correct Answer: 3

Grain spirit is

1. n-propyl alcohol
2. isobutyl alcohol
3. isopropyl alcohol
4. isopropyl alcohol

✅ Correct Answer: 2

Proof spirit is alcohol-water mixture that contains

1. 77.2% alcohol by volume
2. 57.2% alcohol by weight
3. 2N alcohol
4. 2M alcohol

✅ Correct Answer: 2

Amongst the following secondary alcohol is

1. 2-butanol
2. 1-butanol
3. 2-methanol
4. 2-methyl-1-propanol

✅ Correct Answer: 1

thyl methyl carbinol is

1. butyl alcohol
2. primary butyl alcohol
3. tert. butyl alcohol
4. sec. butyl alcohol

✅ Correct Answer: 4

Alcoholic fermentation is carried out by the action of

1. invertase
2. glucose
3. zymase
4. yeast

✅ Correct Answer: 4

Phenol is used in the preparation of

1. aspirin
2. salol
3. bakelite
4. All the above

✅ Correct Answer: 4

Aspirin is also known as

1. Phenyl salicylate
2. Acetyl salicylate
3. Methyl salicylic acid
4. Acetyl salicylic acid.

✅ Correct Answer: 4

3-Dimethyl-2-butanol on reaction with HCl yields mainly

1. 2-Chloro-2 3-dimethylbutane
2. 1-Chloro-2 3-dimethylbutane
3. 2-Chloro-3 3-dimethylbutane
4. 1-Chloro-3 3-dimethylbutane.

✅ Correct Answer: 1

The reaction between alcohol and carboxylic acids is called.

1. Esterification
2. Hydrolysis
3. Saponification
4. Hydrogenation

✅ Correct Answer: 1

Absolute alcohol is

1. 95% methanol
2. 100% ethanol
3. 100% ethanol
4. None of above

✅ Correct Answer: 2

Which of the following is not characteristic of alcohols ?

1. They are lighter than water.
2. Their boiling points increase fairly uniformly with increasing molecular mass
3. Lower members are insoluble in water but solubility regularly increases with molecular
4. Lower mimbers have pleasant smell and burning taste while higher members are odourless adn tasteless.

✅ Correct Answer: 3

Clear orange solution of chromic anhydride in aqueous sulphuric acid turn blue-green on reaction with

1. 3-Methyl-3-pentanol
2. 2-Butanol
3. 2-Methyl-2-propanol
4. 2-Methyl-2-butanol.

✅ Correct Answer: 2

Which of the following alochols would give blood red colouration in Victor Meyers Test ?

1. sec-Pentyl alcohol
2. iso-Pentyl alcohol
3. tert-Pentyl alcohol .
4. None of above

✅ Correct Answer: 1

Sodium will sink in

1. ethanol
2. kerosene
3. water
4. both A and B

✅ Correct Answer: 4

Maltose is converted to???.by maltase.

1. one molecule of glucose and fructose each
2. two molecules of sucrose
3. two molecules of glucose
4. glucose and fructose

✅ Correct Answer: 3

Which of the following alcohols is most soluble in water ?

1. n-Butyl alcohol
2. iso-Butyl alcohol
3. sec-Butyl alcohol
4. tert-Butylalcohol.

✅ Correct Answer: 4

On distilling 2-hydroxy benzoic acid with Zn dust it gives

1. Phenol
2. Benzoic acid
3. Benzaldehyde
4. a polymeric compound.

✅ Correct Answer: 2

Propylene is subjected to hydroboratio oxidation reaction. The product formed would be

1. Propanal
2. 1-Propanol
3. 2-Propanol
4. Propanone.

✅ Correct Answer: 2

Absolute ethyl alcohol cannot be obtained by simple distillation of alcohol because

1. it forms zeotrope with water
2. it forms an azeotropic mixture with water
3. alcohol molecules are heavily hydrated
4. the difference in the boiling point of alcohol and water is less than 300

✅ Correct Answer: 2

Starch is converted to maltose by the enzyme

1. zymase
2. lactase
3. maltase
4. diastase

✅ Correct Answer: 4

Glycerol can be puridied by.

1. Steam distillation
2. Simple distillation
3. Vacuum distillation
4. Frational distillation

✅ Correct Answer: 3

Hou many stereoisomers are possible for 2 3-dichloropentane

1. 2
2. 3
3. 4
4. 6

✅ Correct Answer: 3

Glycerol is obtained on commercial scale from

1. Fats
2. Propylene
3. Both of the above
4. None of above

✅ Correct Answer: 3

Phenol p-Methylphenol m-Nitrophenol and p-Nitrophenol follows order of increasing cidic strength

1. Phenol p-Methylphenol p-Nitro phenol m-Nitrophenol
2. p-Methylphenol Phenol m-Nitro phenol p-Nitrophenol
3. p-Methylphenol m-Nitro phenol Phenol p-Nitrophenol
4. m-Methylphenol p-Nitro phenol Phenol and p-Methyl-phenol.

✅ Correct Answer: 2

Which of the following alcohols will give iodoform test ?

1. Methanol 1-Butanol
2. 1-Butanol
3. 1-Propanol
4. 2-Butanol.

✅ Correct Answer: 4

Ketones can be obtained by.

1. Dehydrogenation of sec-alcohols
2. Dehydrogenation of pri-alcohols
3. Oxidation of sec-alcohols
4. Oxidation of pri-alcohols

✅ Correct Answer: 1

Brandy is produced by

1. distillation of wine
2. mixing alcohol with disprin
3. mixing alcohol with HCl
4. distilling ternary mixture of alcohol benzene and water

✅ Correct Answer: 1

Which of the following compounds does not give positive periodic acid test ?

1. 1 2-Propanediol
2. 2-Propanol
3. 1 2 3-Propanetriol
4. 1 2-Ethanediol.

✅ Correct Answer: 2

Which of the following contains a higher concentration of hydrogen ions?

1. Benzyl alcohol
2. Ethyl alcohol
3. Methanol
4. Phenol

✅ Correct Answer: 4

The final product obtained by the catalytic hydrogenation of phenol is

1. Benzene
2. Cyclohexanol
3. Cyclohexane
4. Benzyl alcohol.

✅ Correct Answer: 2

Hydrolysis of glucose to ethyl alcohol can be carried by

1. zymase
2. invertase
3. maltase
4. sucrose

✅ Correct Answer: 1

Grignard reagent on reaction with acetone forms

1. Tertiary alcohol
2. Secondary alcohol
3. Acetic acid
4. Acetaldehyde.

✅ Correct Answer: 1

Glycol is added tio aviation petrol because

1. It prevents freezing of petrol
2. It minimises the loss of petrol
3. It increases the efficiency of fuel
4. It prevents the engine from heating up.

✅ Correct Answer: 1

Amongst the following phenols which is most acidic

1. Picric acid
2. 2-Nitrophenol
3. 2 4-Dinitrophenol
4. m-Nitrophenol.

✅ Correct Answer: 1

Whcih of the following alcohols is the least soluble in water ?

1. Ethanol
2. 1-Propanol
3. 1-Butanol
4. 1-Pentanol.

✅ Correct Answer: 4