NEET Chemistry Functional Group Tests MCQ Question
What is the color of the precipitate formed when cobalt ions (Co 2+) are treated with potassium nitrite after being dissolved in aqua regia and neutralized with ammonium hydroxide, followed by acidification with dilute acetic acid?
Yellow
White
Black
Blue
Correct Answer
Detailed Explanation
The treatment of cobalt ions with potassium nitrite after dissolution and acidification results in the formation of a yellow precipitate of potassium hexanitritocobaltate(III), according to the NCERT context.
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