A fishy smell is obtained when `F_(2)` is passed through water- why?

What is the coordination entity formed when excess of aqueous KCN is added to aqueous solution of CuSO_(4) ? Why is it that no precipitate of copper sulphide is obtained when H_(2)S(g) is passed through this solution ?

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 -

Slaked lime is obtained when water is added to

What is obtained when acetylene is passed through hot iron tube ?

When H_(2)S is passed through Hg_(2)^(2+) , we get :

Predict the product obtained when Cl_(2) gas is passed through boiling toluene in the presence of sunlight.

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

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