Chemistry-
General
Easy

Question

Which one of the following metals will give blue ash when its salt is heated with N a subscript 2 end subscript C O subscript 3 end subscript solid and C o open parentheses N O subscript 3 end subscript close parentheses subscript 2 end subscript on a charcoal piece

  1. C u    
  2. M g    
  3.  A l    
  4. Z n    

The correct answer is: A l


    C o A l O subscript 2 end subscript is formed which is blue. Follow cobalt nitrate-charcoal test.

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