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प्रश्न
Give two chemical tests to distinguish between dilute nitric acid and hydrochloric acid.
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उत्तर
| Dilute nitric acid | Dilute hydrochloric acid |
| 1. On reacting copper metal with nitric acid brown fumes of nitrogen dioxide. \[\ce{Cu + 4HNO3 -> Cu(NO3)2 + 2NO2 + 2H2O}\] |
1.On treating copper metal with HCl We don't observe any reaction. |
|
2. Brown ring test : Nitric acid in a test tube is taken and then and then freshly prepared ferrous sulphate solution is added. Concentrated H2SO4 is then added carefully down the sides of the test tube, dark brown ring is formed at the juctions of two layers. \[\ce{FeSO4 + NO + 5H2O -> \underset{\text{Hydrated nitrosoferrous Sulphate (brown ring)}}{[Fe(No)(H2O)5]SO4}}\] |
2. No brown ring test is observed in the caseof hydrochloric acid. |
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संबंधित प्रश्न
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X, Y and Z are three crystalline solids that are soluble in water and have a common anion.
To help you to identify X, Y and Z, you are provided with the following experimental observations. Copy and complete the corresponding inferences in (a) to (e).
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INFERENCE 1: The common anion is the ______ ion. - When X is heated, it melts and gives off only one gas which re-lights a glowing splint.
INFERENCE 2: The cation in X is either ______ or ______. - The action of heat on Y produces a reddish-brown gas and yellow residue which fuses with a glass of the test tube.
INFERENCE 3: The metal ion present in Y is the ______ ion. - When Z is heated, it leaves no residue. Warming Z with sodium hydroxide solution liberates a gas which turns moist red litmus paper blue.
INFERENCE 4: Z contains the ______ cation. - Write the equations for the following reactions:
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- The action of heat on Y.
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