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in Chemistry by (63.7k points)

FILL IN THE BLANKS :

  1. Potassium nitrite solution liberates __________ gas with acidified solution of potassium iodide. 
  2. Sodium bromide gives bromine gas with _________ and hydrogen bromide with _________ . 
  3. I ions (not in excess) give _________ precipitate with Hg2+ ions. (red/yellow/green). 
  4. The formula of the deep red vapours formed on warming dichromate with KCl in concentrated H2SO4 is ________. 
  5. SO42– ions form ______________ precipitate with Hg(NO3)2 solution (which colour precipitate).

1 Answer

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  1. Iodine. 
  2. Concentrated H2SO4, H3PO4
  3. Red. 
  4. CrO2Cl
  5. Yellow precipitate of basic mercury(II) sulphate, HgSO4.2HgO ↓ . 

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