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प्रश्न
Give reason for the following:
Conc. Nitric acid renders iron passive.
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उत्तर
Concentrated nitric acid renders iron passive because of the formation of extremely thin, unreactive, protective layer of insoluble metallic oxide on the surface which stops further reaction.
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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.
How will you prepare the following from nitric acid?
Magnesium nitrate
How will you prepare the following from nitric acid?
Ferric nitrate
How is nitric acid prepared in laboratory?
Give reason for the following :
Nitric acid usually does not yield hydrogen from acids.
Choose the correct answer from the option given below :
Concentrated nitric acid oxidises phosphorus to :
Fill in the blank with appropriate word/words.
Aqua regia is a mixture of _______ and________
Give the name of a soluble lead salt and write the eqution for the action of heat on this salt. Write the equation for the preparation of nitric acid from potassium nitrate.
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.
