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Hydrogenation of alkenes and alkynes tak...

Hydrogenation of alkenes and alkynes takes place in presence of certain catalysts. In Sabatier Senderen's reaction, the addition of hydrogen takes place I presence of Raney nickel catalyst. Platininm and palladium can also be used as catalyst and used in finley divided state. Experimentally, it is observed that less crowded alkenes adsorb `H_(2)` with faster rate. Controlled hydrogenation of alkyne `H_(2)` with faster rate. Controlled hydrogenation of alkyne in presence of Lindlar's catalyst yields cis product i.e., 'cis' alkene. Thus, in presence of Lindlar's catalyst 'syn' addition takes place. The relative rate of hydrogenation follows the order:

Non-terminal alkynes are reduced in presence of Na or Li metal dissolved in liquid ammonia. In this reaction, anti-addition of hydrogen results into the trans-product.
Answer the following questions:
The relative rate of catalytic hydrogenation of following alkenes is:

A

IIgtIIIgtIVgtI

B

IgtIVgtIIIgtII

C

IIIgtIVgtIgtII

D

IIgtIVgtIgtIII

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The correct Answer is:
A
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Hydrogenation of alkenes and alkynes takes place in presence of certain catalysts. In Sabatier Senderen's reaction, the addition of hydrogen takes place I presence of Raney nickel catalyst. Platininm and palladium can also be used as catalyst and used in finley divided state. Experimentally, it is observed that less crowded alkenes adsorb H_(2) with faster rate. Controlled hydrogenation of alkyne H_(2) with faster rate. Controlled hydrogenationof alkyne in presence of Lindlar's catalyst yields cis product i.e., 'cis' alkene. Thus, in presence of Lindlar's catalyst 'syn' addition takes place. The relative rate of hydrogenation follows the order: Non-terminal alkynes are reduced in presence of Na or Li metal dissolved in liquid ammonia. In this reaction, anti-addition of hydrogen results into the trans-product. The product of the following reaction is:

Hydrogenation of alkenes and alkynes takes place in presence of certain catalysts. In Sabatier Senderen's reaction, the addition of hydrogen takes place I presence of Raney nickel catalyst. Platininm and palladium can also be used as catalyst and used in finley divided state. Experimentally, it is observed that less crowded alkenes adsorb H_(2) with faster rate. Controlled hydrogenation of alkyne H_(2) with faster rate. Controlled hydrogenation of alkyne in presence of Lindlar's catalyst yields cis product i.e., 'cis' alkene. Thus, in presence of Lindlar's catalyst 'syn' addition takes place. The relative rate of hydrogenation follows the order: Non-terminal alkynes are reduced in presence of Na or Li metal dissolved in liquid ammonia. In this reaction, anti-addition of hydrogen results into the trans-product. H_(3)C-C-=C-CH_(3)+H_(2) overset(Pd//CaCO_(3))underset("Boiling Quinoline")to (A) The product (A) will be:

Hydrogenation of alkyne is

Addition of hydrogen to alkene in presence of nickel catalyst is

The gas(es) used in the hydrogenation of oils in presence of nickel as a catalyst is/are:

the catalyst used in the hydrogenation of oils is :

NARAYNA-ALKENES-level-5 Straight Objective Questions
  1. Hydrogenation of alkenes and alkynes takes place in presence of certai...

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  2. Hydrogenation of alkenes and alkynes takes place in presence of certai...

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  3. Hydrogenation of alkenes and alkynes takes place in presence of certai...

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  4. Acid catalysed hydration of alkene give alcohol. In thic reaction addi...

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  5. Acid catalysed hydration of alkene give alcohol. In thic reaction addi...

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  6. Acid catalysed hydration of alkene give alcohol. In thic reaction addi...

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  7. Alkenes can be prepared by Cope elimination, hofmann elimination and p...

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  8. Alkenes can be prepared by Cope elimination, hofmann elimination and p...

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  9. Alkenes can be prepared by Cope elimination, hofmann elimination and p...

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  10. The stereospecificity of the reactions is a very good evidence that E2...

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  11. The stereospecificity of the reactions is a very good evidence that E2...

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  12. The stereospecificity of the reactions is a very good evidence that E2...

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  13. Dehydrtion of alcohol is unimolecular as well as bimolecular reaction....

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  14. Dehydrtion of alcohol is unimolecular as well as bimolecular reaction....

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  15. Match the column

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  16. Match the following

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  17. Match each of the compound in column I with the product of reductive o...

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  18. Statement-I: Cis-2- butene gives meso compound with Baeyer's reagent. ...

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  19. Assertion: Addition of Br(2) to 1-butane gives two optical isomers. ...

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  20. Statement-I: Reaction of cold alkaline KMnO(4) with alkenes is regiose...

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