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प्रश्न
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
उत्तर
Copper reacts with concentrated nitric acid to produce nitrogen dioxide.
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संबंधित प्रश्न
Name one metal which is extracted by reduction with aluminium.
Which one of the methods given in column I is applied for the extraction of each of the metals given in column II:
| Column I | Column II |
| Electrolytic reduction | Aluminium |
| Reduction with Carbon | Zinc |
| Reduction with Aluminium | Sodium |
| Iron | |
| Manganese | |
| Tin |
How is aluminium metal extracted? Explain with the help of an equation.
Calamine ore can be converted into zinc oxide by the process of:
(a) dehydration
(b) roasting
(c) calcination
(d) sulphonation
Give the principles of the hydrolytic method.
Give reasons, why aluminum is used in:
painting electric and telegraphic poles
Define the following term.
Gangue
Answer the following question:
Carbon cannot reduce the oxides of sodium, magnesium, and aluminum to their respective metals. Why? Where are these metals placed in the reactivity series? How are these metals obtained from their ores? Take an example to explain the process of extraction along with chemical equations.
In the electrolytic method, a layer of highly active metal is applied to a less active metal.
Explain Bayer’s process of concentration of bauxite with a chemical equation.
