CrO₃ dissolves in aqueous NaOH to give
(a) Cr₂O₇²⁻ (b) CrO₄²⁻
(c) Cr(OH)₃ (d) Cr(OH)₂
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Answer:
CrO₃ dissolves in aqueous NaOH to give
(a) Cr₂O₇²⁻
(b) CrO₄²⁻
(c) Cr(OH)₃
(d) Cr(OH)₂
Answered by
1
CrO₃ dissolve in aqueous NaOH to give CrO₄²⁻.
Option: (b)
Explanation:
- Chromium is a silvery metal which is brittle. It is similar to aluminum which exhibits several oxidation states.
- It has the most oxidation states: +3, +2, and +6 also exist. The +3 oxidation state is said to be most stable.
- CrO₃ reacts with aqueous NaOH solution to give two products Na₂CrO₄ which is CrO₄⁻².
- The chemical reaction of CrO₃ with NaOH is provided below,
CrO₃ + 2NaOH Na₂CrO₄ + H₂O
To know more about reactions of chromium ions,
1) Why Cr,Al do not dissolve in conc.HNO3???
https://brainly.in/question/2820757
2) Masking agent to keep chromium in solution and can be withdrawn after filteration
https://brainly.in/question/8050099
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