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प्रश्न
Choose the correct answer from the option given below :
Concentrated nitric acid oxidises phosphorus to :
पर्याय
H3PO4
P2O3
H3PO2
H4P2O7
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उत्तर
H3PO4
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संबंधित प्रश्न
Name the gas evolved when the following mixtures are heated.
Sodium nitrite and ammonium chloride.
Explain the following:
Concentrated nitric add appears yellow when it is left standing in a glass bottle.
Name the products formed when dilute HNO3 is added to copper.
Ammonia is used in the Ostwald process.
Name the catalyst used in the process.
Write an equation for the following conversions A, B, C and D.
Why is freshly prepared ferrous sulphate solution used for testing the nitrate radical in the brown ring test?
Can we use conc. HCl in place of Conc. H2SO4 ?
Complete and balance the following equation :
FeSO4 + NO + H2O → ______________
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.
Give a balanced equation for the following reaction:
Copper reacts with concentrated nitric acid.
