Question # 1

Grignard's reagent on treatment with carbonyl compounds yield

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Pheonol

Alcohol

Alkane

None of these

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

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ZnCl₂

Pyridine

H₂SO₄

Either

Which of the following with aqueous KOH will give acetaldehyde?

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1, 2-Dichloroethane

1,1-Dichloroethane

Chloracetic acid

Ethyl chloride

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

Among the following the most reactive towards alcoholic KOH is

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CH₂= CHBr

CH₃COCH₂CH₂Br

CH₃CH₂Br

CH₃CH₂CH₂Br

Aryl halides are less reactive towards nucleophilic substitution reactions as compared to alkyl halides due to

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The formation of less stable carbonium ion

Resonance stabilization

Larger carbon-halogen bond

The inductive effect

Elimination bimolecular reactions usually obey

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First order kinetics

Second order kinetics

Third order kinetics

Zero order kinetics

Which of the following reacts with chloroform and base to form phenyl isocynaide?

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Nitrobenzene

Phenol

Chlorobenzene

Aniline

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

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Onsolubility

Instability

Inductive effect

Steric hindrance

In which of the following reactions is the inorganic reagent acting as a nucleophile

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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

Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

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A ketone

An aldehyde

An ether

Water

When an alcohol reacts with SOCI₂an alkyl halide is formed. What are two other products

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SO₂and HCI

SI₂and H₂O

HCI and H₂O

H₂S and HCI

What is the total number of different chloroethanes of formula C₂H_6-nCl_npossible (n may be 1 to 6)

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6

8

9

10

Alkyl halides in which a halogen atom is bonded to that carbon atom which directly bonded with one hydrogen atom is called

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Primary alkyl halides

Secondary alkyl halides

Tertiary alkyl halides

Quaternary alkyl halides

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

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

Which of the following reagent cannot be used for preparing alkyl chloride from alcohol?

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HCl + anhyd. Zncl₂

NaCl

PCl₅

SOCl₂

Reduction of alkyl halides give

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Alkanes

Alkenes

Ketones

Ether

Ethyl chloride on treatment with aqueous alkali gives

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Ethane

Ethene

Ethanal

Ethanol

Both E₁and E₂mechanism can be shown by

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1° - RX

2° - RX

3° - RX

None of these

C- X bond is strong in

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CH₃Cl

CH₃Br

CH₃F

CH₃I

Organic compounds containing halogen atom are called:

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R---OH

R----X

R----NH₂

R----COH

SN2 reaction can be best carried out with

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Primary alkyl halides

Secondary alkyl halides

Tertiary alkyl halides

All the three

Grignard reagent is reactive due to :

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The presence of halogen atom

The presence of Mg atom

The polarity of C - Mg bond

None of them

Ethyl bromide on treatment with alcoholic KOH gives

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Ethylene

Ethanol

Acetic Acid

Ethane

Elimination bimolecular reactions involve:

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First order Kinetics

Third order kinetics

Zero order kinetics

The chloroform reacts with NaOH to give

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CH₃COONa

Sodium oxalate

CH₃OH

HCOONa

Benzene reacts with chlorine to form benzene hexachloride in presence of

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Nickel

AlCl₃

Bright sunlight

Zinc

Alkyl halides react with Mg in dry ether to form

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Magnesium halide

Grignard's reagent

Alkene

Alkyne

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