RRB Group D (Level-1 posts) 2025 · Question 307 of 386

In electrolytic refining, the impure metal is used as which of the following?

Answer: D. Anode

Official answer key verified. Detailed explanation coming soon.

Source: RRB Group D 2024 Question Paper PDF (Dec 27, 2025) (Shift 2) · official-answer-key

Practice the full RRB Group D (Level-1 posts) 2025 paper

Timed test with all 386 questions, just like the real exam.