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Dihydrogen gas adds to alkenes and alkyn...

Dihydrogen gas adds to alkenes and alkynes in the presence of finely divided catalysts like `Pt, Pd, or Ni` to form alkanes. This process is called

A

hydrogenation

B

hydration

C

hydrogenolysis

D

none of these

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To answer the question regarding the addition of dihydrogen gas to alkenes and alkynes in the presence of catalysts, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Reaction**: - We are looking at a reaction where dihydrogen gas (H₂) is added to unsaturated hydrocarbons, specifically alkenes and alkynes. 2. **Understand the Role of Catalysts**: - The reaction involves finely divided catalysts such as platinum (Pt), palladium (Pd), or nickel (Ni). These catalysts facilitate the addition of hydrogen to the carbon-carbon double or triple bonds. 3. **Recognize the Type of Reaction**: - The process of adding hydrogen to alkenes or alkynes is a type of addition reaction. In this case, it specifically refers to the addition of hydrogen across the unsaturated bonds. 4. **Name the Process**: - The specific name for this process is "Hydrogenation." During hydrogenation, the unsaturated bonds (double or triple) are converted into saturated bonds (single) by the addition of hydrogen. 5. **Conclusion**: - Therefore, the answer to the question is that the process is called **Hydrogenation**.
To answer the question regarding the addition of dihydrogen gas to alkenes and alkynes in the presence of catalysts, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Reaction**: - We are looking at a reaction where dihydrogen gas (H₂) is added to unsaturated hydrocarbons, specifically alkenes and alkynes. 2. **Understand the Role of Catalysts**: ...
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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 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 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:

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: