Published by:
CGP EDU Academic Team
Published on: August 14, 2026
Which one of the following cation will give a green coloured ash when a piece of filter paper dipped in a solution containing its salt and Co(NO 3 ) 2 is burned ?
Text Solution
Verified by ExpertsThe correct answer is:
D
The filter paper ash test is substitute for cobalt nitrate charcoal cavity test. Double oxide ZnO.CoO formed is green in colour. It is called Rinmann's green.
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