1.

On addition of conc. H_2SO_4 to a chloride salt, colourless fumes are evolved but in case of iodide salt, violet fumes come out. This is because

Answer»

`H_2SO_4` REDUCES HI to `I_2`
HI is of VIOLET colour
HI gets oxidised to `I_2`
HI changes to `HIO_3`

Solution :HI being a stronger reducing AGENT than `H_2SO`., reduces `H_2SO_4 " to " SO_2`is itself oxidised to I. On the other hand, HCL is RELATIVELY weaker reducing agent and docs not reduce `H_2SO_4 " to " SO_2`and itself is not oxidised to `Cl_2.`


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