An aqueous solution containing one mole of `HgI_2` and two moles of NaI is orange in colour. On addition of excess NaI the solution becomes colourless. The orange colour reappears on subsequent addition of NaOCl. Explain with equation.

The aqueous solution containing one mole of CoCl_(3).5NH_3 consumed 2 mol of silver nitrate solution for precipitation of free chloride ions. The formula of the compound should be

State True or false The addition of Br_(2) to NaI turns the solution violet.

A metal nitrate reacts with KI solution to give a block precipitate which on addition of excess of KI solution forms an orange coloured solution. The cation of metal nitrate is :

In a titration of iodine with sodium thiosulphate , the formation of a blue colour on the addition of colourless starch solution indicates that

An aqueous solution of CoCl_2 on addition of excess of concentrated HCl turns blue due to formation of

one litre of an aqueous solution contains 0.15 mole of CH_(3)COOH(pK_(a=4.8)) and 0.15 mole of CH_(3) COONa. After the addition of 0.05 mole of solid NaOH to this solution, the pH will be :

When two moles of [Co(NH_3)_5Cl]Cl_2 is treated with excess silver nitrate solution, the number of moles of silver chloride formed is

A solution containing 0.2 mole of dicholoracetice acid (K_(a)=5xx10^(-2)) and0.1 mole sodium dicholoroacetate in one litre solution has [H^(+)] :

A white amorphous A on heating yields a colourless, non-combustible gas B a solid C .The latter compound assumes a yellow colour on heating and changes to white on cooling C dissolve in dilute hydrochloric acid and the resulting solution gives a white precipitate with K_(4)Fe(CN)_(6) solution .A dissolve in dilute HCI with the evolution of gas , which is identical in all respect B turns lime milky , but the milkiness disuppears with the contimous passage of gas solution of A as obtained above gives a white precipitate D on the addition of excess of NH_(4)OH and passing H_(2)S another portion of the solution gives initialy a white precipitate E on the addition of NaOH solution , which dissolves on further addition of base , identify the compounds A,B,C,D and E

A metal nitrate reacts with KI to give a black precipitate which on addition of excess of Kl is converted into orange colour solution.The cation of the metal nitrate is :