On mixing two solutions , a precipitate is formed if `…………` is greater than `………….`

Chocolate brown precipitate is formed with:

When potassium iodide solution is added to lead acetate solution, a red precipitate is formed. ………………….

Aqueous solution of a salt 'A', when mixed with NaoH solution and warmed, a black precipitate is formed. Black ppt. is filtered and dissolved in dil. H_(2)SO_(4) solution. The resulting solution gives a chocolate coloured precipitate with potassium ferrocyanide solution. the filtrate obtained after filtering off the black precipitate, upon warming with Zn and NaOH evolves a pungent smelling gas. the resulting solution also responds to the ring test. the filtrate does not evolve any gas when it is boiled with urea in the presence of H_(2)SO_(4) . Q. The filtrate obtained after filtering off the black precipitate consists of:

Aqueous solution of a salt 'A', when mixed with NaoH solution and warmed, a black precipitate is formed. Black ppt. is filtered and dissolved in dil. H_(2)SO_(4) solution. The resulting solution gives a chocolate coloured precipitate with potassium ferrocyanide solution. the filtrate obtained after filtering off the black precipitate, upon warming with Zn and NaOH evolves a pungent smelling gas. the resulting solution also responds to the ring test. the filtrate does not evolve any gas when it is boiled with urea in the presence of H_(2)SO_(4) . Q. The chocolate coloured precipitate is:

The IE of Be is greater than that of B.

When potassium iodide solution is added to a solution of lead (II) nitrate in a test tube, a precipitate is formed. (a) What is the colour of this precipitate? Name the compound precipitated. (b) Write the balanced chemical equation for this rection. (c) List two types of reactions in which this reaction can be placed.

Give examples and explain with equations: (a)Two colourless solution give a black precipitate on mixing. (b)Two colourless solutions give a red precipitate on mixing, soluble in excess of one of them. ( c)Two colourless solutions give a white precipitate on mixing, soluble in ammonium hydroxide. (d)Two colourless solutions give a yellow precipitate on mixing.

An aqueous solution of a substance, on treatment with dilute HCl, gives a white precipitate soluble in hot water. When H_(2)S is passed through the hot acidic solution, a black precipitate is formed. The substance is:

(a). The addition of NaOH solution to a solution of zinc chloride produces a white precipitate which dissolves on further addition of NaOH. (b). The addition of NH_4OH to ZnSO_4 solution produces white precipitate but no precipitate is formed if it contains NH_4Cl .