Question # 1

SN₂reactions can be best carried out with:

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Prl. alkyl halide

Sec. Alkyl halide

Ter. Alkyl halide

All of three

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2-bromo-3-methylbutane

3-methyl-2-bromobutane

2-methyl-3-bromobutane

All of these

The reaction of an alkyl halide with RCOOAg produces

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Ester

Ether

Aldehyde

Ketone

Iodoethane reacts with sodium in ether, the product formed is

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Pentene

Propyne

Butene

Butane

Grignard's reagent is

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Alkyl halide

Magnesium halide

Alkyl magnesium halide

Ethereal solution of an alkyl halide

Catalyst in the reaction ROH + SOCl₂-------> RCL+SO₂+HCl is:

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ZnCl₂

Pyridine

H₂SO₄

Either

For the carbylamine reaction we need hot alc.KOH and

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Any amin and chloroform

Chloroform and Ag powder

A primary amine and chloroform

A mono alkyl amine and trichlorom-ethane

Ethyl bromide is formed by the reaction of HBr with

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Ethane

Ethene

Ethyne

Propane

Which is a weak nucleophile

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OH^-

Br^-

NH₃

CI^-

In primary alkyl halides, the halogen atom is attached to a carbon which attached to how many carbon atoms?

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Two

Three

One

Four

The compounds or species in search of electrons are called

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Elctrophiles

Nucleophile

Nitrities

Bases

Any other aldehyde except formaldehyde on reaction with Grignard's will produce

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Secondary alcohol

Primary alcohol

Tertiary alcohol

Aromatic alcohol

Steps in SN , reactions are:

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One

Two

Three

Four

Reduction of alkyl halides give

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Alkanes

Alkenes

Ketones

Ether

The alkyl halide is converted into an alcohol by

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Addition

Substitution

Dehydrohalogenation

Elimination

Grignard reagent is not prepared in aqueous medium but prepared in ether medium because

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The reagent is highly reactive in ether

The reagent does not react with water

The reagent becomes inactive in water

The reagent reacts with water

Which one of the following in mainly responsible for depletion of ozone layer?

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Methane

Carbon dioxide

Water

chloroflurocarbons

Which responds to +ve iodoform test?

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Butanol-1

Butan-1-al

Butanol-2

2-pentanone

C₆H₆Cl₆can be obtained from

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HCl and Benzene

Cl₂and Benzene and AlCl₃

Cl₂and Benzene in diffused light

NaOCl and Benzene

Dehydrohalogenation of alkyl halides give

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Alkanes

Alkenes

Alkynes

Alkdehyde

Alkyl halides react with Mg in dry ether to form

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Magnesium halide

Grignard's reagent

Alkene

Alkyne

Which of the following with aqueous KOH will give acetaldehyde?

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1, 2-Dichloroethane

1,1-Dichloroethane

Chloracetic acid

Ethyl chloride

With the increase in size of halogen atom the reactivity of an alkyl halide

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Increases

Decreases

Remain constant

None of these

When chloroform is boiled with NaOH, it gives

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Formic acid

Trihydroxymethane

Acetylene

Sodium formate

What happens when CCl₄is treated with AgNO₃solution?

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NO₂will be evolved

A white ppt. of AgCl will form

CCl₄will dissolve in AgNO₃solution

Nothing will happen

Primary carbon attaches with other hydrogen atoms directly:

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One

Two

Three

At least one or more than it

The elimination of hydrogen halide from adjacent carbon atoms is called

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Dehydrogenation

Hydrogenation

Dehydrohalogenation

Hydrohalogenation

2-Bromopentane is heated with potassium ethoxide in ethanol . The major product obtained is

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2-Ethoxypentane

Pent-1-ene

cis-Pent-2-ene

trans-Pent-2-ene

When CO₂is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is

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Propane

Propanoic acid

Propanal

Propanol

CFCs undergo homolytic fission by uv light in the stratosphere which radical could result from this irradiations of CHCICF₂Cl.

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CHF Cl C FCl

CH Cl CF₂Cl

CHF CF₂Cl

C FCl CF₂Cl

Alkyl halides on treatment with aqueous KOH give

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Phenol

Alcohol

Aldehyde

Ketone

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