Question # 1

The general representation for Grignard reagent is.

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RMgX

ReMgX

RXMg

RMgX2

Grignard's 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 the above

SN₂reactions can be best carried out with

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primary alkyl halides

secondary alkyl halides

tertiary alkyl halides

All the three

For which mechanisms, the first step involved is the same

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E₁and E₂

E₂and SN₂

E₁and E₂

E₁and SN₁

Which alkyl halide does not form Grignard's reagent.

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CH3-Br

CH3-Cl

CH3- F

CH3-I

The reactivity of Grignard's regent is due to

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Polarity of Mg-x bond

Polarity of C-Mg bond

Electro negativity of halogen atom

Presence of Mg-atom

What products is formed when ethyl bromide reacts with magnesium to form Grignard's reagent.

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Pyridine

Anhydrous ether

Ethyl alcohol

Carbon tetrachloride

Which products is not formed when ethyl alcohol reacts with SOCl2 in the presence of pyridine.

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Ethyl chloride

Hydrogen chloride

Sulphur di oxide

Sulphur tri oxide

Which substance is used to convert alcohol to alkyl halide.

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SOCl2

PCl3

HCl +ZnCl2

All of these

Secondary alkyl halides are those in which halogen atom is attached with a carbon atom which is further attached to.

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One beta carbon

Two beta carbon

Three beta carbon

Four beta carbon

Which one of the following alcohols will be formed when ethyl magnesium bromide reacts with acetone.

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Primary alcohol

Secondary alcohol

Tertiary alcohol

Dehydrin alcohol

The most reactive Alkyl halide is

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Alkyl Iodide

Alkyl Bromide

Alkyl fluoride

Alkyl Chloride

Which one of the following reactants will be required to form ethyl alcohol form ethyl bromide.

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Alcoholic KOH

Aqueous KOH

Alkaline KMnO4

Sodium metal in ether

Acetic acid can be obtained from CH3MgI by treatment with.

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H2O

CINH2

CO2

HCHO

Which one of the following will be required to form ethene from ethyl chloride.

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Alcoholic KOH

Aqueous KOH

Alkaline KMnO4

Bromine

------------------- is not a nucleophile

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H₂O

NO₃

BF₃

NH₃

Which one of the following species is a nucleophile

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CH3

(CH3)2 C

BF3

OH-

Which compound is formed, when CH₃OH reach with CH₃- Mg -Br

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Ethane

Methane

Ethanol

Acetone

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