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  1. Which one of the following is true in electrolytic refining
  2. Bond length between hybridised carbon atom and other carbon atom is minimum in
  3. Which of the following explains the sequence of filling the electrons
  4. Be resembles much with
  5. In acidic medium, H₂O₂ changes Cr₂O₇²⁻ to CrO₅ which has two