Advertisements
Advertisements
प्रश्न
What do you observe when caustic soda solution is added to the following solution, first a little and then in excess:
Pb(NO3)2
Write balanced equation for this reaction.
Advertisements
उत्तर
\[\ce{Pb(NO3)2 + 2NaOH -> \underset{\text{White ppt.}}{Pb(OH)2↓} + \underset{\text{colourless}}{2NaNO3}}\]
In excess of alkali, white precipitate of Pb(OH)2 becomes soluble :
\[\ce{Pb(OH)2 + 2NaOH(excess) ->\underset{\text{Sodium Plumbate (colourless)}}{Na2PbO2 + 2H2O}}\]
संबंधित प्रश्न
Identify the substance underlined, in the following case:
Cation that does not form a precipitate with ammonium hydroxide but forms one with sodium hydroxide.
Identify the cations in the following case:
NaOH solution, when added to the Solution (A), gives a reddish brown precipitate
What do you observe when caustic soda solution is added to the following solution, first a little and then in excess:
ZnSO4
Write a balanced equation for this reaction.
Using sodium hydroxide solution, how will you distinguish:
Iron (II) chloride from iron (III) chloride
Using Sodium hydroxide solution, how would you distinguish: Zinc nitrate solution from calcium nitrate solution.
Using Sodium hydroxide solution, how would you distinguish: Iron(II) chloride from Iron (III) chloride
Sodium hydroxide solution is added to the solutions containing the ions mentioned in List X. List Y gives the details of the precipitate. Match the ions with their coloured precipitates.
| List X | List Y |
| (i) Pb2+ | (A) Reddish Brown |
| (ii) Fe2+ | (B) White insoluble inexcess |
| (iii) Zn2+ | (C) Dirty green |
| (iv) Fe3+ | (D) White soluble in excess |
| (v) Cu2+ | (E) White soluble in excess |
| (vi) Ca2+ | (F) Blue |
State your observation of the following case :
When excess sodium hydroxide is added to calcium nitrate solution
Name the metal hydroxides which are insoluble in caustic soda solution.
Write the word equation when ammonium salt is heated with caustic soda solution.
