grignard reagent a very useful starting compound for a

Grignard reagent, a very useful starting compound for a number of organic reactions can be prepared by

A. reaction of alkyl halides with a solution of magnesium hydroxide

B. reaction of alkyl halides with dry magnesium powder in presence of dry ether

C. reaction of \[MgC{{l}_{2}}\] with ether and alcohol

D. reaction of alkyl halide with magnesium in presence of alcohol

Answer : reaction of alkyl halides with dry magnesium powder in presence of dry ether

Solution :
\[RX+Mg\xrightarrow{\text{dry}\,\,\text{ether}}\underset{\text{Grignard reagent}}{\mathop{R-Mg-X}}\,\]

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Organic Chemistry >> Electrophilic Aromatic Substitution (Haloalkanes and Haloarenes)

Releted Question 1

The reaction of toluene with chlorine in presence of ferric chloride gives predominantly :

A. benzoyl chloride

B. $$m $$ - chlorotoluene

C. benzyl chloride

D. $$o $$ - and $$p $$ - chlorotoluene

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Releted Question 2

Bottles containing $${C_6}{H_5}I$$ and $${C_6}{H_5}C{H_2}I$$ lost their original labels. They were labelled $$A$$ and $$B$$ for testing. $$A$$ and $$B$$ were separately taken in test tubes and boiled with $$NaOH$$ solution. The end solution in each tube was made acidic with dilute $$HN{O_3}$$ and then some $$AgN{O_3}$$ solution was added. Substance B gave a yellow precipitate. Which one of the following statements is true for this experiment ?

A. $$A$$ and $${C_6}{H_5}C{H_2}I$$

B. $$B$$ and $${C_6}{H_5}I$$

C. Addition of $$HN{O_3}$$ was unnecessary

D. $$A$$ was $${C_6}{H_5}I$$

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Releted Question 3

Fluorobenzene $$\left( {{C_6}{H_5}F} \right)$$ can be synthesized in the laboratory

A. by direct fluorination of benzene with $${F_2}$$ gas

B. by reacting bromobenzene with $$NaF$$ solution

C. by heating phenol with $$HF$$ and $$KF$$

D. from aniline by diazotisation followed by heating the diazonium salt with $$HB{F_4}$$

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Releted Question 4

Reaction of $$trans$$ 2 - phenyl - 1 - bromocyclopentane on reaction with alcoholic $$KOH$$ produces

A. 1 - phenylcyclopentene

B. 3 - phenylcyclopentene

C. 4 - phenylcyclopentene

D. 2 - phenylcyclopentene

View Answer

Grignard reagent, a very useful starting compound for a number of organic reactions can be prepared by

Releted MCQ Question on
Organic Chemistry >> Electrophilic Aromatic Substitution (Haloalkanes and Haloarenes)

The reaction of toluene with chlorine in presence of ferric chloride gives predominantly :

Fluorobenzene $$\left( {{C_6}{H_5}F} \right)$$ can be synthesized in the laboratory

Reaction of $$trans$$ 2 - phenyl - 1 - bromocyclopentane on reaction with alcoholic $$KOH$$ produces

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Electrophilic Aromatic Substitution (Haloalkanes and Haloarenes)

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Grignard reagent, a very useful starting compound for a number of organic reactions can be prepared by

Releted MCQ Question on Organic Chemistry >> Electrophilic Aromatic Substitution (Haloalkanes and Haloarenes)

The reaction of toluene with chlorine in presence of ferric chloride gives predominantly :

Fluorobenzene $$\left( {{C_6}{H_5}F} \right)$$ can be synthesized in the laboratory

Reaction of $$trans$$ 2 - phenyl - 1 - bromocyclopentane on reaction with alcoholic $$KOH$$ produces

Practice More Releted MCQ Question on Electrophilic Aromatic Substitution (Haloalkanes and Haloarenes)

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Releted MCQ Question on
Organic Chemistry >> Electrophilic Aromatic Substitution (Haloalkanes and Haloarenes)

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Electrophilic Aromatic Substitution (Haloalkanes and Haloarenes)