Question # 1

Which one of the following alkanes will be formed by the hydrolysis of ethyl magnesium bromide

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Methane

Ethane

Butane

do not hydrolysed

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

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

SN₂reactions can be best carried out with

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primary alkyl halides

secondary alkyl halides

tertiary alkyl halides

All the three

Alkyl halides are considered to be very reactive compounds towards nucleophile because

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They have an electrophilic carbon

They have an electrophilic carbon and a good leaving group

They have an electrophilic carbon and a bed leaving group

They have a nucleophilic carbon and a good leaving group

SN2 mechanism involves

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1st order kinetic

2nd order kinetic

3rd order kinetic

Zero order kinetic

S_N2 mechanism involves

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1st order kinetics

2nd order kinetics

3rd kinetics

zero order kinetics

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

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

Which one of the following species is not an electrophile.

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HN3

Br

H+

BF3

When CO2 is made to react with ethyl magnesium iodide, followed by acid hydrolysis, the product formed is.

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Propane

Propanoic acid

Propanal

Propanol

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

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

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Two

Three

One

Four

Elimination biomolecular reactions involve.

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First order kinetics

Second order kinetics

third order kinetics

Zero order kinetics

For which mechanisms, the first step involved is the same

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E₁and E₂

E₂and SN₂

E₁and E₂

E₁and SN₁

Which one of the following species is a nucleophile

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CH3

(CH3)2 C

BF3

OH-

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

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Fluoride > Chloride > Bromide > iodide

Chloride > Bromide > Fluoride > iodide

Bromide > iodide > chloride > Fluoride

Iodide > Bromide > Chloride > Fluoride

SN2 reactions can be best carried out with

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Primary alkyl halides

Secondary alkyl halides

Tertiary alkyl halides

All the three

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