What change of colour is observed when `H_2S` gas is passed through an acidified aqueous solution of potassium dichromate?

NO gas is passed through acidified KMnO_(4) solution.

Cl_(2) gas is passed throught acidified FeSO_(4) solution.

O_(3) gas is passed throught acidified FeSO_(4) solutions.

H_(2)S gas is passed through chlorine -water .

State, with equations, what happens when: XeF_(2) gas is passed through an aqueous solution of potassium bromate.

What type of sol is obtained when H_(2)S gas is passed over an aqueous solution is SO_(2) ?

Write down the formula of the black precipitate formed when H_2S gas is passed through an aqueous solution of lead nitrate?

In qualitative analysis, a black precipitate is obtained when H_(2)S is passed through an acidified aqueous solution of a salt . A blue coloured solution is obtained on boiling the preciptate with dilute HNO_(3) . The substance obtained on addition of excess of ammonia solution to this blue solution is -

When H_(2)S gas is passed through an acidified solution of Cu^(2+) and Zn^(2+) , only CuS is precipitated-why?

State, with equations, what happens when O_(3) gas is passed through an aqueous solution of Kl.