Question

The reaction of $ H_{2} $ on ethene in presence of catalyst is called :

• A. Sabatier Sanderens reaction
• B. Darzen reaction
• C. Rosenmund reduction
• D. none of the above

Answer 1

The Correct Option is A

The Sabatier-Senderens reaction is the addition of hydrogen to alkenes in the presence of powdered Ni, working as a catalyst.

In the conversion of carbon monoxide or carbon dioxide into organic molecules, the Sabatier-Senderens reaction, a reduction process, plays a significant role. As Fischer-Tropsch synthesis was later developed as a heterogeneous hydrogenation catalyst that operates at atmospheric pressure, this reduction process has undergone significant modification. 

By passing through the vapour of organic molecules and hydrogen over heated Raney Ni solid particles, the Sabatier-Senderens reaction is a nickel-based hydrogenation process that transforms unsaturated hydrocarbons into saturated hydrocarbons.

Fine-grained solid nickel particles that were isolated from a Ni-Al alloy are utilised as the catalyst in this process and are known as Raney Ni. When nickel is utilised as a fine-grained particle size, its surface area rises. Ni has a wide surface area, which boosts its catalytic activity. Additionally, when Raney Ni's surface area rises, the Sabatier-Senderens reaction rate does as well.

As a result, the Assertion is true, and the Reason is the proper justification for the Assertion.

A catalyst may undergo brief physical changes during a reaction and even form fleeting chemical bonds with the reactants, but at its conclusion, it reverts to its initial condition. 

A catalyst quickens the process but leaves the equilibrium state unchanged. By providing a second route for the reaction, a catalyst decreases the activation energy and the height of the barrier. The activation energy is, however, equalised for the forward and backward responses. 

The equilibrium position remains unaltered as a result of the equal rise in the forward and backward response rates. However, the equilibrium is attained earlier if the two rates are raised.

The equilibrium position remains unaltered as a result of the equal rise in the forward and backward response rates. However, the equilibrium is attained earlier if the two rates are raised.

Despite the fact that two reactions are quite similar, a catalyst that works for one process could not work for the other.

The catalyst has no impact on the reactions. The energy of the reactants (Er) and products (Ep), which results in the same (Ep- Er), is unaffected by the inclusion of a catalyst.