Experiment

Observation

Conclusion

Put one spatula endful of the sample in a dry test tube and heat.

On gentle heating, water condensed on cooler parts of test tube a colour with pungent smell, was gas evolved. It turns red litmus blue and fumed HCI(g). Colourless gas with a chok adour evolved which turns blue decolourises potassium permanganate red-brown residue after heating.

Put one spatula endful of the sample in a test tube and add water.

The solid dissolves forming a pale green solution.

Probably Fe²⁺, CU²⁺, Ni²⁺ present.

To the aqueous solution in a test tube add NaOH(aq) dropwise until in excess

Dirty green precipitate insoluble in excess, turns brown on exposure to air. On warming, a colour-less gas, with 000000a pungent smell was evolved, it turned red litmus blue and ..

To 1cm³ of the solution in a test tube, add aqueous ammonia dropwise until in excess

Dirty green precipitate insoluble in excess, turned brown on exposure to air.

To 1cm₃ of the solution in a test tube, add dil. HNO₃₃)₂(aq) followed by Ba(NO

White precipitate, insoluble in the acid

To 1cm₃ of the test tube, add potassium

Dark blue precipitate

To 1cm₃ of the solution in the test tube, add AgNO₃(aq)

White precipitate