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In the presence of peroxide addition of HBr to propene takes place according to anti Markovnikov’s rule but peroxide effect is not seen in the case of HCl and HI. Explain. - Chemistry

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प्रश्न

In the presence of peroxide addition of HBr to propene takes place according to anti Markovnikov’s rule but peroxide effect is not seen in the case of HCl and HI. Explain.

दीर्घउत्तर
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उत्तर

The bond energy of HCl is higher than that of HBr thus it is not cleaved by free radical mechanism to exhibit peroxide effect. However in case of HI the bond energy is so low that the iodine radical forms readily and after formation it combines to form an iodine molecule.

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पाठ 13: Hydrocarbons - Multiple Choice Questions (Type - I) [पृष्ठ १७०]

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एनसीईआरटी एक्झांप्लर Chemistry [English] Class 11
पाठ 13 Hydrocarbons
Multiple Choice Questions (Type - I) | Q 51 | पृष्ठ १७०

संबंधित प्रश्‍न

Write IUPAC name of the product obtained by the ozonolysis of the following compound.

Pent-2-ene


An alkene ‘A’ contains three C – C, eight C – H σ bonds and one C – C π bond. ‘A’ on ozonolysis gives two moles of an aldehyde of molar mass 44 u. Write IUPAC name of ‘A’.


Write a chemical equation for combustion reaction of the following hydrocarbon:

Butane


Write a chemical equation for combustion reaction of the following hydrocarbon: 

Pentene 


Write a chemical equation for combustion reaction of the following hydrocarbon:

Hexyne


Write a chemical equation for combustion reaction of the following hydrocarbon:

Toluene


Arrange the halogens F2, Cl2, Br2, I2, in order of their increasing reactivity with alkanes.


Arrange the following hydrogen halides in order of their decreasing reactivity with propene.


An alkene 'X' on ozonolysis produces two moles of isovaleraldehyde. Predict the IUPAC name of the alkene. 


Which of the following reagent is used for the following reaction?

\[\ce{CH3CH2CH3 ->[?] CH3CH2CHO}\]


The major product formed in the following reactions is:


What would be the main product when propene reacts with HBr?


Propene, \[\ce{CH3 - CH = CH2}\] can be converted to 1-propanol by oxidation. Which set of reagents among the following is ideal to effect the conversion ______.


3-Methyl-pent-2-ene on reaction with HBr in presence of peroxide forms an addition product. The number of possible stereoisomers for the product is ______.


In the presence of peroxide, HCl and HI do not give anti-Markovnikov's addition of alkenes because ______.


An alkene ‘A’ contains three C – C, eight C – H σ bonds and one C – C π bond. ‘A’ on ozonolysis gives two moles of an aldehyde of molar mass 44 u. Write the IUPAC name of ‘A’.


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