Question # 1

To prepare ethane by Wurtz synthesis the suitable alkyl halide is

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Ethyl iodide

any alkyl iodide

Ethyl chloride

Methyl bromide

Which will not react with phenol

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NaOH

Br2

KMn04/OH-

Na

The reagent for alkaline hydrolysis of ethyl bromide to form ethyl alcohol is

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water at room T

Alcoholic KOH+heat

Ethanol + heat

dil. NaOH+ heat

Alcohols of low molecular weight are:

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Soluble in water

Insoluble in water

Soluble in water on heating

Insoluble in all solvents

Which one among the following is not a good leaving group

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HSO4-

CI-

OH-

Br-

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

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Acetone

Echanol

Acetaldehyde

Formaldehyde

Tertiary alcohols have alpha bydrogens

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1

Zero

2

3

Phenol is colourless, crystalline and solid

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Hygroscopie

Deliquescent

Moistening

Odourless

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

CH3CH2CH2OH--------A---------B Here B is

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Propyne

Propanal

Propene

Propane

The carbon atom of an alkyl group attached with halogen atom is called

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Electrophile

Free redical

Nucleophile

Nucleophilic centre

The dehydration of ethyl alcohol with concentrated H2SO4 at 140°C gives

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Ethene

Alcohol

Diethyl ether

Carboxylic acid

The reagent used to distinguish between ethanol and propanal is

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I2/ NaOH

Benedict's reagent

LiAIH

sodium nitroprusside

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

Which reagent is responsible for the conversion of ketone to secondar alcohul

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NaAlH

NaBH4

Al

Red P

Which of the following test is not given by aldehvde

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2. 4 DNPH test

NaHSO3 test

Tollen's test

Sodium nitroprusside test

Formalin is used as:

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Fungicide

Germicide

Sterilizing of surgical instruments

All three

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 isomer of C4H9Br will produce 2-methyl propane-2-ol on treatment with aqueous KOH

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n-butyI bromide

Sec-butyI bromide

Isobutyl halide

Tertiary butyl chloride

A mixture of 1-chloropropane and 2-chloro-propane when treated with alcoholic KOH, gives

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Prop-2-ene

Isopropy lene

Propene

A mixture of prop-l-ene

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