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प्रश्न
Brown ring disappear if the test tube is disturbed.
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उत्तर
lf the test tube is disturbed brown ring will disappear because the complex formed will get dissolved in the layers of the liquid.
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संबंधित प्रश्न
How will you prepare the following from nitric acid?
Lead nitrate
Name a metal nitrate which on heating is changed into metal.
Name the catalyst used in Ostwald process.
Write the equations involved in Ostwald process.
Give reason for the following:
Lighting is a blessing in disguise.
Choose the correct answer from the option given below :
When treated with nitric acid which of the following liberate hydrogen?
Fill in the blank with appropriate word/words.
98% nitric acid is obtained by distilling 68% nitric acid with ________ under ______
Explain the following:
Concentrated nitric acid appears yellow when it is left standing in a glass bottle.
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).
- A reddish-brown gas is obtained when X, Y and Z are separately warmed with concentrated sulphuric acid and copper turning added to the mixture.
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:
- X and concentrated sulphuric acid (below 200°C). (One equation only for either of the cations given in INFERENCE 2)
- The action of heat on Y.
- Concentrated nitric acid is added to copper turnings kept in a beaker.
Complete the table:
| Name of Process | Inputs | Equation | Output |
| Ammonia + Air | Nitric acid |
