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कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

Why is it necessary to avoid even traces of moisture during the use of a Grignard reagent? - Chemistry

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प्रश्न

Why is it necessary to avoid even traces of moisture during the use of a Grignard reagent?

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उत्तर

Grignard reagents are highly reactive and react with even traces of water to give corresponding hydrocarbons.

\[\ce{RMgX + H2O –>RH + Mg(OH)X}\]

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पाठ 10: Haloalkanes and Haloarenes - Exercises [पृष्ठ १४४]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 12
पाठ 10 Haloalkanes and Haloarenes
Exercises | Q III. 66. | पृष्ठ १४४

संबंधित प्रश्‍न

Identify A, B, C, D, E, R and R1 in the following:


How will you bring about the following conversion?

Bromomethane to propanone


How will you bring about the following conversion?

1-Chlorobutane to n-octane


Explain why Grignard reagents should be prepared under anhydrous conditions?


How the following conversion can be carried out?

Chloroethane to butane


In the preparation of chlorobenzene from aniline, the most suitable reagent is:


Which of the following alkyl halides is used as a methylating agent?


Which one of the following produces acyl halide by treatment with PCl5?


Which of the following statements are correct about the reaction intermediate?

(i) Intermediate (c) is unstable because in this carbon is attached to 5 atoms.

(ii) Intermediate (c) is unstable because carbon atom is sp2 hybridised.

(iii) Intermediate (c) is stable because carbon atom is sp2 hybridised.

(iv) Intermediate (c) is less stable than the reactant (b).


Draw other resonance structures related to the following structure and find out whether the functional group present in the molecule is ortho, para directing or meta directing.


\[\ce{R - CH2 - CCl2 - R ->[Peagent] R - C ≅ C - R}\]. The reagent is:-


Grignard reagent shows addition on


The product formed in the first step of the reaction

\[\begin{array}{cc}
\ce{Br}\phantom{......}\\
|\phantom{.......}\\
\ce{CH3-CH2-CH-CH2-CH-CH3}\\
\phantom{...............}|\\
\phantom{................}\ce{Br}
\end{array}\]

with excess Mg/Et2O(Et = C2H5) is:


Explain why Grignard reagents should be prepared under anhydrous conditions?


Explain why Grignard reagents should be prepared under anhydrous conditions?


Explain why Grignard reagents should be prepared under anhydrous conditions?


Explain why Grignard reagents should be prepared under anhydrous conditions? 


Explain why Grignard reagents should be prepared under anhydrous conditions?


Explain why Grignard reagents should be prepared under anhydrous conditions?


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