Question

In the reaction of sodium borohydride with \(X\) gives diborane as one product. Identify \(X\) and type of reaction. 
 

• A. \(I_2\), neutralisation reaction
• B. \(O_2\), addition reaction
• C. \(O_2\), substitution reaction
• D. \(I_2\), redox reaction

Hint:

Redox reactions are characterized by the transfer of electrons between reactants, leading to changes in oxidation states. Recognizing the reducing and oxidizing agents can help identify such reactions.

Answer 1

The Correct Option is D

In this reaction, sodium borohydride (\({NaBH}_4\)), which is a reducing agent, reacts with iodine (\(I_2\)) to produce diborane (\({B}_2{H}_6\)). The reaction can be described as a redox reaction, where:
- Sodium borohydride donates electrons (reduced).
- Iodine accepts electrons (oxidized).
This type of reaction leads to the formation of diborane as a by-product through the reduction of boron by hydrogen, which is liberated during the reduction of iodine. The process involves the transfer of electrons, characteristic of redox reactions.