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प्रश्न
When an ammonium salt is warmed with sodium hydroxide solution, a gas is evolved. State three ways in which you could identify this gas.
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उत्तर
\[\ce{NH4Cl + NaOH -> NaCl + H2O + NH3}\]
The gas that evolved is ammonia.
Tests for Ammonia gas:
- It has a sharp, characteristic odour.
- It gives dense white fumes with conc. HCl.
\[\ce{NH3 + HCl -> NH4Cl}\] - It gives light to deep Brown Colour or ppt. with nessler’s solution K2HgI4.
संबंधित प्रश्न
State your observation When excess sodium hydroxide is added to calcium nitrate solution
Choose the correct answer from the options given below :
Color of ferrous ion is
The questions (i) to (v) refer to the following salt solutions listed A to F :
A. Copper nitrate
B. Iron (II) sulphate
C. Iron (III) chloride
D. Lead nitrate
E. Magnesium sulphate
F. Zinc chloride
(i) Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution/
(ii) Which two solutions will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution?
(iii) Which solution will give a white precipitate when either dilute hydrochloric acid or dilute sulphuric acid is added to it?
(iv) Which solution becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it?
(v) Which solution gives a white precipitate with excess ammonium hydroxide?
Write balanced equation for a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
Name the products formed when the reaction with two different amphoteric oxides with a caustic alkali.
A given white crystalline salt was tested as follows:
The addition of barium chloride solution into this solution gave a white precipitate. What conclusions can be drawn for the observation?
When an ammonium hydroxide solution is added to solution B, a pale blue precipitate is formed. This pale blue precipitate dissolves in excess ammonium hydroxide giving an inky blue solution. What is the cation present in solution B?
Write a balanced equation of a coloured metallic oxide which dissolves in alkalis to yield colourless solutions.
Write balanced equation for a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
Write balanced equation for a metal that evolves a gas which burns with a pop sound when boiled with alkali solutions.
