Question # 1

The alkyl halide is converted into an alcohol by

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Addition

Substitution

Dehydrohalogenation

Elimination

The compounds or species in search of electrons are called

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Elctrophiles

Nucleophile

Nitrities

Bases

When metallic sodium in ether is heated with ethyl chloride, which alkane is formed

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Propane

Ethane

Iso-butane

N-butane

Which is a weak nucleophile

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OH^-

Br^-

NH₃

CI^-

Grignard's reagent was prepared in:

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1900

1910

1920

1930

When carbon dioxide is passed through the R - Mg - X is produced

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Any carboxylic acid

Propanoic acid

Propanedioic acid

None of these

Which represents nucleophilic aromatic substitution reaction?

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Reaction of benzene with Cl₂in sunlight

Benzyl bromide hydrolysis with water

Reaction of NaOH with dintrofluoro benzene

Sulphonation of benzene

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Primary alkyl halide

Secondary alkyl halide

Tertiary alkyl halide

None of these

Ethyl chloride on treatment with aqueous alkali gives

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Ethane

Ethene

Ethanal

Ethanol

Electronegativity order of alkyl halides is:

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Rl > RBr > RCl > RF

Rbr > RCl > RF >Rl

RCl > RF >Rl > RBr

RF >Ri > RBr >RII

Which of the following compounds could be prepared by reacting bromoethane with KCN and then reducing the product

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CH₃CH₃

CH₃CH₂NH₂

CH₃CH₂CH₂NH₂

CH₃CH₂CH₃

Ethyl bromide is formed by the reaction of HBr with

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Ethane

Ethene

Ethyne

Propane

The most reactive compound for electrophilic nitration will be

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Benzyl chloride

Benzoic acid

Nitrobenzene

Chlorobenzene

Both E₁and E₂mechanism can be shown by

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1° - RX

2° - RX

3° - RX

None of these

On warming with silver powder,chloroform is converted into

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Acetylene

Hexachloroethane

1,1,2,2-tetrachloroethane

ethylene

Alkyl halides are considered to be very reactive compounds towards nucleophiles, because:

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They have an electrophilic carbon

They have an electrophilic carbon and good living gorup

They have an electrophilic carbon and bad living group

They have an nucleophilic carbon and good living gorup

Grignard's reagent is

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Alkyl halide

Magnesium halide

Alkyl magnesium halide

Ethereal solution of an alkyl halide

The order of reactivity of an alkyl halide (R-X) for a particular alkyl group is

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Iodide > bromide > chloride

Chloride > bromide > iodide

Bromide > chloride > iodide

Bromide > iodide > chloride

The reactivity order of alkyl halides for a particular alkyl group is:

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F >Cl>Br>I

Cl>Br>F>l

l>Br>Cl>F

Br>l>Cl>F

Primary carbon attaches with other hydrogen atoms directly:

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One

Two

Three

At least one or more than it

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

Which of the followings is not a nulceophile

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OH^-

NH₃

C₂H₅O^-

Br₂

Among the following the most reactive towards alcoholic KOH is

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CH₂= CHBr

CH₃COCH₂CH₂Br

CH₃CH₂Br

CH₃CH₂CH₂Br

Cyanoform is ________ acid in nature than the chloroform. The missing word is

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Stronger

Weaker

Amphoteric

Neutral

Grignard's reagent on treatment with dry CO₂and HCI yields

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Ester

Alcohol

Carboxylic acid

Aldehyde

Tertiary alkyl halides are practically inert to substitution by S_N2 mechanism because of

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Onsolubility

Instability

Inductive effect

Steric hindrance

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NH₃ HCl

KCN in C₂H₅OH NaOH

KCN in C₂H₅OH HCl

HCN NaOH

The final product formed by distilling ethyl alcohol with excess of Cl₂and Ca(OH)₂is

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CH₃CHO

CCl₃CHO

CHCl₃

(CH₃)₂O

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

Reduction of alkyl halides give

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Alkanes

Alkenes

Ketones

Ether

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