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प्रश्न
Write the name.
Metals which are amphoteric in nature.
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उत्तर
Metals which are amphoteric in nature- Aluminium (Al), zinc (Zn)
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संबंधित प्रश्न
In the electrolytic refining of a metal M, what would you take as anode, cathode and electrolyte?
In the extraction of aluminium: Draw the diagram for the extraction of aluminium.
Name one metal which is extracted by:
Reduction with heat alone.
The non-metal present in steel is ______.
Name two metals which occur in nature in free state as well as in combined state.
Which metal is extracted from bauxite ore?
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
The metal which can be extracted from the bauxite ore is ______.
The major ore of aluminium is known as ______.
Calamine ore can be used to extract one of the following metals. This metal is:
A black metal oxide XO2 is used as a catalyst in the preparation of oxygen gas from potassium chlorate. The oxide XO2 is also used in ordinary dry cells. The metal oxide XO2 cannot be reduced satisfactorily with carbon to form metal X.
- Name the metal X.
- Name the metal oxide XO2.
- Which reducing agent can be used to reduce XO2 to obtain metal X?
- Name another metal which can also be extracted by the reduction of its oxide with the above reducing agent.
Give the principles of the hydrolytic method.
Give reasons, why aluminum is used in:
In aluminiothermy
Correct the following statement :
Copper reacts with nitric acid to produce nitrogen dioxide.
Extraction of moderately reactive elements is done by _______ and _______ method.
Explain Bayer’s process.
Explain the characteristics of ionic compounds.
Explain in brief types of extraction of highly reactive metals according to their reactivity.
Explain in brief types of extraction of moderately reactive metals according to their reactivity.
2 mL each of concentrated HCl, HNO3 and a mixture of concentrated HCl and concentrated HNO3 in the ratio of 3 : 1 were taken in test tubes labelled as A, B and C. A small piece of metal was put in each test tube. No change occurred in test tubes A and B but the metal got dissolved in test tube C respectively. The metal could be
