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प्रश्न
Which reagent will you use for the following reaction?
\[\ce{CH3CH2CH2CH3 -> CH3CH2CH2CH2Cl + CH3CH2CHClCH3}\]
पर्याय
Cl2/UV light
\[\ce{NaCl + H2CO4}\]
Cl2 gas in dark
Cl2 gas in the presence of iron in dark
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उत्तर
Cl2/UV light
Explanation:
Free radical chlorination or bromination of alkanes gives a complex mixture of isomeric mono- and polyhaloalkanes, which is difficult to separate as pure compounds. In this case, a mixture of the two isomeric forms of butane is obtained by the use of Cl2/UV light as per the reaction below -
\[\ce{CH3CH2CH2CH3 ->[Cl2/UV light][or heat] CH3CH2CH2CH2Cl + CH3CH2CHClCH3}\]
APPEARS IN
संबंधित प्रश्न
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(a) 2- Bromo-2 methylbutane
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Answer the following question.
Write one stereochemical difference between SN1 and SN2 reactions.
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In the SN1 reaction, racemization takes place. It is due to:
Which of the following is a chiral compound?
SN1 reaction of alkyl halides lead to ___________.
Which of the following undergoes nucleophilic substitution exclusively by SN1 mechanism?

Which of the statements are correct about above reaction?
(i) (a) and (e) both are nucleophiles.
(ii) In (c) carbon atom is sp3 hybridised.
(iii) In (c) carbon atom is sp2 hybridised.
(iv) (a) and (e) both are electrophiles.
Compound ‘A’ with molecular formula \[\ce{C4H9Br}\] is treated with aq. \[\ce{KOH}\] solution. The rate of this reaction depends upon the concentration of the compound ‘A’ only. When another optically active isomer ‘B’ of this compound was treated with aq. \[\ce{KOH}\] solution, the rate of reaction was found to be dependent on concentration of compound and \[\ce{KOH}\] both.
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The following questions are case-based questions. Read the passage carefully and answer the questions that follow:
|
Nucleophilic Substitution: Influences of solvent polarity: The reaction rate (SN2) of 2-bromopropane and NaOH in ethanol containing 40% water is twice slower than in absolute ethanol. Hence the level of solvent polarity has an influence on both SN1 and SN2 reactions but with different results. Generally speaking, a weak polar solvent is favourable for SN2 reaction, while a strong polar solvent is favourable for SN1. Generally speaking, the substitution reaction of tertiary haloalkane is based on SN1 mechanism in solvents with a strong polarity (for example ethanol containing water). |
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(b) Why is ethanol less polar than water? (1)
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(i) CH3 – CH2 – I or CH3CH2 – Cl
(ii)

OR
(c) Arrange the following in the increasing order of their reactivity towards SN1 reactions: (2)
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(ii) 1-Bromo-3-methylbutane, 2-Bromo-2-methylbutane, 2-Bromo-3- methylbutane
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