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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
Write a balanced equation and name the products formed when cupric oxide reacts with nitric acid.
How will you prepare the following from nitric acid?
Magnesium nitrate
What is meant by the following term?
Decrepitation
What do you observe when?
Scrap zinc is heated with conc. HNO3?
Fill in the blank with appropriate word.
Furning nitric acid is obtained by dissolving an excess of _______ in conc. Nitric acid
The first step in the manufacture of nitric acid is the catalytic oxidation of ammonia. What is the name of the catalyst?
What would you observe in the following case:
Copper is heated with concentrated nitric acid in a hard glass test tube.
Write a balanced equation for following :
Laboratory preparation nitric 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.
Explain why nitric acid is kept in a reagent bottle for a long time.
