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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
Give a balanced chemical equation for Laboratory preparation of Nitric acid.
Give reason for the following:
Aqua regia dissolves gold and platinum.
Give reason for the following:
Concentrated nitric acid is a stronger oxidizing agent.
Write balanced equation and name the product formed when :
Cupric oxide reacts with nitric acid.
What do you observe when?
Conc. HNO3 drops on the skin of a person?
Give reason for the following:
In the laboratory preparation of nitric acid, the mixture of concentrated sulphuric acid and sodium nitatre should not be heated very strongly, above 200°C
State the conditions for the oxidation of ammonia to nitrogen monoxide [nitric oxide], in the manufacture of nitric acid by Ostwald's process. Write the balanced equcation for the reaction.
What do you see when concentrated nitric acid is added to copper?
Dilute nitric acid is generally considered a typical acid except for its reaction with metals. In what way is dilute nitric acid different from other acids when it reacts with metals?
What would you observe in the following case:
Copper is heated with concentrated nitric acid in a hard glass test tube.
