1.

(i) What happens when H_2S is passed into potassium dichromate in acidic medium ? Give the equation. (ii) What is the composition of chromite ore ?

Answer»

Solution :(i) `H_2S` gets OXIDIZED to sulphur
`Cr_2O_(7)^(2-) + 14H + 6E to 2Cr^(+3) + 7H_2O`
`3H_2S to 6H^(+) + 3S + 6e^(-) `
(II) `FeCr_2O_4`.


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