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प्रश्न
A white solid A when heated with sodium hydroxide solution, gives a pungent gas B, which turns red litmus blue. The solid, when dissolved in dilute nitric acid and treated with silver nitrate gives a white precipitate of C which is soluble in an ammonia solution.
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उत्तर
C is silver chloride which is soluble in ammonia.
Pungent smelling gas B is ammonia.
White solid A is ammonium chloride.
\[\ce{NH4Cl(s) ->[NaOH] NH3(g) + H2O + NaCl}\]
\[\ce{NH3(g) ->[Red litmus] blue litmus}\]
\[\ce{\underset{\text{A}}{NH4Cl(s)} ->[AgNO3][HNO3] \underset{\text{C}}{AgCl(s)}}\]
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संबंधित प्रश्न
State one relevant observation for given reactions:
Action of Sodium hydroxide solution on ferrous sulfate solution.
Name the chloride of a metal which is soluble in excess of ammonium hydroxide. Write equation for the same.
Name a yellow monoxide that dissolves in hot and concentrated caustic alkali.
Three test tubes contain calcium nitrate solution, zinc nitrate solution and lead nitrate solution.Describe the effect of Adding sodium hydroxide solution to each portion in turn till it is in excess.
Write the observation, and balanced equation for the following reaction:
Sodium hydroxide is added dropwise to a solution of zinc sulphate, till it is in excess.
Identify the substance Q based on the information given below:
The white crystalline solid Q is soluble in water. It liberates a pungent smelling gas when heated with sodium hydroxide solution.
Choose the correct answer from the options given below :
Hydroxide of this metal is soluble is sodium hydroxide solution
Sodium hydroxide solution is added first in a small quantity, then in excess to the aqueous salt solutions of copper (II) sulphate, zinc nitrate, lead nitrate, calcium chloride, and iron (III) sulphate. Copy the following table and write the colour of the precipitate in (i) to (v) and the nature of the precipitate (soluble or insoluble) in (vi) to (x).
| Aqueous salt solution | Colour of precipitate when NaOH is added in a small quantity | Nature of precipitate (soluble or insoluble) when NaOH is added in excess |
| Copper (II) sulphate | (i) | (vi) |
| Zinc nitrate | (ii) | (vii) |
| Lead nitrate | (iii) | (viii) |
| Calcium chloride | (iv) | (ix) |
| Iron (III) Sulphate | (v) | (x) |
Distinguish by adding:
Sodium hydroxide solution and ammonium hydroxide solution to calcium salt solution and lead salt solution.
Aqueous lead (II) nitrate can be distinguished from aqueous zinc nitrate by adding any of the following solutions in excess, except:
