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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
Explain the following:
Dilute nitric acid is generally considered a typical acid but not so in its reaction with metals.
Ammonia is used in the Ostwald process.
Name the catalyst used in the process.
How will you prepare the following from nitric acid?
Aqua regia
Give reason for the following:
In laboratory preparation of nitric acid all the apparatus including cork should be made up of glass.
Complete and balance the following equation :
FeSO4 + NO + H2O → ______________
Complete and balance the following equation :
HNO3 + FeSO4 + H2SO4 → ______________
Fill in the blank with appropriate word/words.
Aqua regia is a mixture of _______ and________
Complete and balance the following equation:
Cu + HNO3 → NO2 + ________+ _________
Write the equation for the laboratory preparation of nitric acid from potassium nitrate and concentrated sulphuric acid.
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.
