Which one of the following metals will give blue ash when its salt is – InterviewSolution

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1.	Which one of the following metals will give blue ash when its salt is heated with Na_(2)CO_(3) solid and Co(NO_(3))_(2) on a charcoal piece
Answer» `CU` `Mg` `Al` `Zn` SOLUTION :`CoAlO_(2)` is formed which is BLUE. FOLLOW cobalt nitrate-charcoal test.

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