Question # 1

Which of the following undergoes easy dehydration?

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3-MethyIbutan-2-ol

Ethanol

2.Methylpropan-2-ol

Methanol

Which reactant does hnof liberate water on reaction with alcohol

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NH3

K2Cr2O7/15H2O

HCI

PCI3

Which one of the following alcohol is indicated by formation of yellow crystals in lodoform tesr?

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Methanol

Ethanol

Butanol

Propanol

Which of the following alcohol cannot be produced by treatment of aldehydes or ketones with NaBH4

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I-propanol

2-Methyl-2-propanol

2-propanol

Ethanol

A student mixed ethyl alcohol with small amount of sodium dichromate and added it to the hot solution of dilute sulphuric acid. A vigorous reaction took place. He distilled the product formed immediately. What was the product?

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Aceton3

Dimethyi ether

Acetic acid

Acetaldehyde

The red brown ppt. of Fehling solution and benedict solution tests are of

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Ag

Cu2O

CuO

AgBr

C=O and C=C bonds are differentiated by

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Hybridization of C-atom

Bond angles

Ammonical AgNO3

Conc. HNO3

One of the following can produce greater number of moles of ethyl chloride on reacting with escess of ethanol

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PCI5

PCI3

HCI/ZnCl2

SOCI2

Acetone reacts with HCN to form a cyanohydrin. It is an example of

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Nucleophilic addition

Electrophilic substitution

Electrophilic addition

Nucleophilic substitution

Which of the following gives positive haloform test and positive Fehling solution

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Acetone

Echanol

Acetaldehyde

Formaldehyde

Which of the following is more reactive where 0-H bonds break

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P°alcohol

T° alcohol

S°alcohol

Cannot be predicated

Ethanol reacts with sodium metal to liberate

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CO2 gas

CO gas

H2 gas

Steam

An electron with drawing group attached to e-position in phenol

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makes it basic

Stabilises the phenoxide ion

decreases its basicity

allows it to precipitate in aqueous solution

The addition compound obtained by reacting acetaldelyde and HCN, when Iydrolyzed gives

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Ethyl alcohol

Methyl cyanide

2-Hydroxy propanoic acid

Ethyl cyanide

Which of the following compound is least reactive

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HCHO

CH3CHO

CH3COCH3

C6H5CHO

Tertiary alcohols have alpha bydrogens

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1

Zero

2

3

Alcohol is less acidie than phenol due to

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higher ka value

Instability of alkoxide ion

stability of carbocation

Stability of phenol

The reagent used to distinguish between ethanol and propanal is

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I2/ NaOH

Benedict's reagent

LiAIH

sodium nitroprusside

In aldehydes and ketones carbon of carbonyl group is;

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sp³ hyhridized

sp² hybridized

sp hybridized

un hybridized

Which of the following gives silver mirror with ammonicaT AgNO3

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Benzyl alcohol

Benzene

Benzoic acid

Benzaldehyde

Which of the following alcohols is least reactive with respect to 0-H bond

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CH3OH

CH-CH2-OH

(CH3)2-CH-OH

(CH3)3OH

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