Chemistry-
General
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Question

Three metal ions x+2, y+2, z+2 are identify in qualitative analysis. Nitrates of x+2, y+2, z+2 dissolve in three seprate test tubes and gives following observation.
i) All solution produce carbonate precipitate with (NH4 )2CO3
ii) Only one produce white ppt on addition of NaCl.
iii) Out of 3 cations two produce sulphide ppt.
iv) Sulphide of y+2 is not produce by H2S/H+ but produce when H2S is passed in basic medium.
v) Only y+2 produce soluble sulphate
vi) x +2 gives no ppt with dil NH4OH
Select correct about xCO3 , y CO3 , z CO3 -

  1. All are soluble in dil. H2SO4    
  2. All are soluble in dil HCl    
  3. None is soluble in dil. H2SO4    
  4. Except ZCO3 all are soluble in dil. HCl    

The correct answer is: Except ZCO3 all are soluble in dil. HCl

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