In a uranium recovery process, an aqueous solution of uranyl ion is evaporated, dried in air at 400° C and… · ABC26IN0430
Subject: Inorganic Chemistry · Chapter: Lanthanides and Actinides · Topic: Lanthanide And Actinide – General · Exam: GATE 2005-2021 · Marks: 2 · Difficulty: Medium
In a uranium recovery process, an aqueous solution of uranyl ion is evaporated, dried in air at $400^{\circ} \mathrm{C}$ and subsequently reduced with hydrogen at $700^{\circ} \mathrm{C}$ to obtain a uranium compound ( X ). The oxidation state of uranium in X is ____ (Given: atomic number of U is 92 )
Answer
SELF-PRACTICE — the source book printed no answer.
Nothing is invented here, so this question has no answer on record.
Explanation
Answer: +4 — Uranyl salts dried and calcined in air give UO₃ (or U₃O₈); H₂ at 700 °C reduces this to UO₂, in which U is +4.