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प्रश्न
One chemical test that would enable you to distinguish between the following pair of chemicals. Describe what happens with each chemical or state 'no visible reaction'.
Calcium nitrate solution and zinc nitrate solution.
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उत्तर
Zinc nitrate solution from calcium nitrate solution :
a. \[\ce{ZnNO3 + 2NaOH ->\underset{\text{White gelatinous ppt.}}{Zn(OH)2 + NaNO3}}\]
On further addi tion of NaOH, Zn(OH)2 dissolves.
b. \[\ce{Ca(NO3)2 + 2NaOH ->\underset{\text{White ppt.}}{Ca(OH)2} + 2NaNO3}\]
Ca(OH)2 precipitates are sparingly soluble in excess of sodium hydroxide.
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संबंधित प्रश्न
Write the probable colour of the following salt:
Ammonium salts
Write the probable colour of the following salt:
Calcium salts
Write the probable colour of the following salt:
Aluminium Salts
Name a colourless cation not a representative element.
Write the colour of the following salts: Cuprous salts.
Write the colour of the following salt : Ferrous salts.
Write balanced equation for the following reaction:
Zinc and sodium hydroxide solution
The questions (i) to (v) refer to the following salt solutions listed A to F:
- Copper nitrate
- Iron (II) sulphate
- Iron (III) chloride
- Lead nitrate
- Magnesium sulphate
- Zinc chloride
- Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution?
- Which two solutions will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution ?
- Which solution will give a white precipitate, when either dilute hydrochloric acid or dilute sulphuric acid is added to it?
- Which solution becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it ?
- Which solution gives a white precipitate with excess ammonium hydroxide solution?
Colour of the precipitate formed on adding NaOH solution to iron (II) sulphate solution is ______.
| Abhishek was given a salt ‘X’ which was white in colour for analysis. On strong heating, it produced a yellow residue, a colourless gas and also a reddish-brown gas. The solution of the salt ‘X’, when tested with an excess of ammonium hydroxide, produced a chalky white insoluble precipitate. |
- Name the coloured gas that evolved when Abhishek heated the salt strongly.
- Which cation was present in the sample given to Abhishek?
- Identify the salt given to Abhishek for analysis.
