Question # 1

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

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-NO₂

-CN

-X (halogens)

All

Scientific study of fermentation was first made by

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Buchner

Liebig

Biot

Pasteur

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

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Alcohals can be distinguished using test:

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Lucas

Tollen's

Koib's

William's

Which compound shows hydrogen bonding

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C₂H₆

C₂H₅CI

CH₃- O - CH₃

C₂H₅OH

An organic compound will decolorise dill acidified (aq) KMnO₄on warming, but will not decolorise bromine water. What is the compound

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KMnO₄

Ethanol

Ethane

CH₃CH₂Cl

Which of the following process is employed to convert alkyl halide into alcohol?

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Addition

Substitution

Dehydrohalogenation

Molecular rearrangement

Phenol is heated with CCl₄and alkaline KOH when salicylic acid is produced.The reaction is known as

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Frledel-Craft reaction

Riemer-Tiemann's reaction

Rosenmund's reaction

Sommelet reaction

Which of the following compound is obtained on passing ethanol vapours on heated Al₂O₃?

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Ethylether

Acetone

Ethane

Ethanol

Phenol was discovered by:

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Hofmann

Runge

Henderson

Bakelite

Organic acid without a carboxylic acid group is

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Ascorbic acid

Vinegar

Oxalic acid

Picric acid

An organic compound A reacts with methyl magnesium iodide to form an addition product which on hydrolysis forms the compound B . Compound B gives blue colour salt in Victor Meyer's test.The compounds A and B are respectively

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Acetaldehyde, tertiary butyl alcohol

Acetaldehyde, ethyl alcohol

Acetaldehyde, isopropyl alcohol

Acetone, isopropyl alcohol

Dehydration of ethyl alcohol yields

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Aldehyde

Ketone

Acid

Alkene

Methyl alcohol is not used

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As a solvent

A an anti-freezing agent

As a substitute for petrol

For denaturing of ethyl alcohol

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

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Ketone

Aidehyde

Ether

Alkyl halide

Which of the following will not give iodoform test?

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Ethanol

Ethanal

Isopropyl alcohol

Benzyl alcohol

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

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How many secondary alcoholic groups are present in the structure of glucose OHC CHOH CHOHCH OH CHOH CH₂OH

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1

2

3

4

Industrial alcohol may be denaturated by the addition of

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Methyl alcohol

Acetone

Pyridine

Any of the above reagent

Propanone is the product obtained by dehydrogenation of

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2-Propanol

1-Propanol

Isobutyl alcohol

Propanethoil

Which one of the following correctly describes the acid properties of phenol

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Stronger than HCI

Stronger than carboxylic acid

An acid stronger than carbonic acid

An acid weaker than carboxylic acid

Which the increase in carbon number of solubility of an alcohol

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Increases

Decreases

Remains unaffected

None of these

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

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Diastase

Maltase

Zymase

Invertase

The reaction of sodium with ethanol gives

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CH₃OH

NaH

H₂O

H₂

The boiling point of glycerol is more than propanal because of

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Hybridisation

H-bonding

Resonance

All these factors

Use of ethanol as:

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Drink

Solvent and fuel

In beverage

All of these

Which alcohol gives only one oxidation product when wormed with dil acidified K₂Cr₂O₇

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Butan-1-ol

Butan-2-ol

2-methyl propan-1-ol

2-methyl propan-2-ol

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

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Cyclohexene

Cyclohexane

Benzene

Benzyne

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

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Carboxylic acid > phenol > alcohol

Carboxylic acid > alcohol > phenol

Phenol > carboxylic acid > alcohol

Alcohol > phenol > carboxylic acid

Which of the following is an isomer of ethanol

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CH₃OCH₃

C₂H₅OC₂H₅

CH₃OH

C₂H₅OH

Concentration of rectified spirit is:

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12%

14%

90%

95%

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