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If CO2 is passed into waste water containing CrO4–2 (yellow), then, solution turns:           
  • a)
    Green due to formation of Cr+3                               
  • b)
    Blue due to formation of CrO5            
  • c)
    Orange due to formation of Cr2O72–                        
  • d)
    Black due to formation of Cr3+
Correct answer is option 'C'. Can you explain this answer?
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If CO2 is passed into waste water containing CrO4–2 (yellow), th...
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If CO2 is passed into waste water containing CrO4–2 (yellow), th...
If CO2 is passed into wastewater containing CrO4 (chromate), the following reaction can occur:

CO2 + H2O ↔ H2CO3

The carbon dioxide reacts with water to form carbonic acid (H2CO3). The chromate ion (CrO4) in the wastewater can react with carbonic acid to form chromic acid (H2CrO4) and carbon dioxide gas:

CrO4 + H2CO3 ↔ H2CrO4 + CO2

This reaction converts chromate ions into chromic acid, which may have different properties and behavior in wastewater treatment processes. However, it is important to note that the specific reaction and its consequences may depend on the concentration of chromate ions, the pH of the wastewater, and other factors.
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If CO2 is passed into waste water containing CrO4–2 (yellow), then, solution turns:a)Green due to formation of Cr+3b)Blue due to formation of CrO5c)Orange due to formation of Cr2O72–d)Black due to formation of Cr3+Correct answer is option 'C'. Can you explain this answer? for Chemistry 2025 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about If CO2 is passed into waste water containing CrO4–2 (yellow), then, solution turns:a)Green due to formation of Cr+3b)Blue due to formation of CrO5c)Orange due to formation of Cr2O72–d)Black due to formation of Cr3+Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Chemistry 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If CO2 is passed into waste water containing CrO4–2 (yellow), then, solution turns:a)Green due to formation of Cr+3b)Blue due to formation of CrO5c)Orange due to formation of Cr2O72–d)Black due to formation of Cr3+Correct answer is option 'C'. Can you explain this answer?.
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