Question

B can be obtained from halide by van-Arkel method. This involves reaction

• A. \( \text{B} \) + \( \text{Red} \text{I}_2 \) → \( \text{B}_2 \) + 3I
• B. \( \text{B} \) + \( 3 \text{H}_2 \) → \( \text{B}_2 \) + 6HCl
• C. \( \text{B} \) + \( 3 \text{H}_2 \) → \( \text{B}_2 \) + 3H
• D. \( \text{B}_2 \) + 3\( \text{Cl}_2 \)

Hint:

The van-Arkel method is used for the purification of metals and involves the reduction of metal halides.

Answer 1

The Correct Option is A

Step 1: Reaction mechanism.
The van-Arkel method involves the reduction of metal halides using hydrogen and halogens. In this case, B is obtained from its halide by the reaction where 3I is involved in the process.

Step 2: Conclusion.
The correct reaction is \( \text{B}_2 \) + 3I, corresponding to option (1).