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प्रश्न
What is passive iron?
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उत्तर
Iron becomes inert when reacted with nitric acid due to the formation of an extremely thin layer of insoluble metallic oxide, which stops the reaction.
\[\ce{Fe + 6HNO3 -> Fe(NO3)3 + 3H2O + 3NO2}\]
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संबंधित प्रश्न
How will you prepare the following from nitric acid?
Ferric nitrate
The action of heat on the blue crystalline solid X gives a reddish brown gas Y, a gas which re-lights a glowing splint and leaves a black residue. When gas Z, which has a rotten egg smell, is passed through a solution of X, a black ppt. is formed.
- Identify X, Y and Z.
- Write the equation for the action of heat on X.
- Write the equation between solution X and gas Z.
Name the following :
Gas produced in air during lighting.
What is the purpose of Conc. H2SO4 in the above preparation?
Give reason for the following:
In laboratory preparation of nitric acid all the apparatus including cork should be made up of glass.
Give two chemical tests to distinguish between dilute nitric acid and hydrochloric acid.
Write balanced equation for the reaction between nitrogen and oxygen, when lightning strikes.
The first step in the manufacture of nitric acid is the catalytic oxidation of ammonia. What is the name of the catalyst?
Explain the following:
Concentrated nitric acid appears yellow when it is left standing in a glass bottle.
Give one test to distinguish between the following pair of chemicals.
Zinc nitrate solution and calcium nitrate solution
