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On addition of conc. H2SO4 to a chloride salt, colourless fumes are evolved but in case of an iodide salt, violet fumes come out. This is because
On addition of conc. H2SO4 to a chloride salt, colourless fumes are evolved but in case of an iodide salt, violet fumes come out. This is because
CBSE | Chemistry | Class 12 | Exercise 1 | NCERT Exemplar | The P-Block Elements
On addition of conc. H2SO4 to a chloride salt, colourless fumes are evolved but in case of an iodide salt, violet fumes come out. This is because

(i) H2SO4 reduces HI to I2

(ii) HI is of violet colour

(iii) HI gets oxidised to I2

(iv) HI changes to HIO3

 

 

Correct Answer: (iii) HI gets oxidised to I2

Explanation:

Reaction Involved:-

NaCl + H2SO4 ⟶ HCl + Na2SO4

2NaI + H2SO4 → Na2SO4 + 2HI ⟶ 2H2O + SO2 + I2

 

 

 

 

 

 

i

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