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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
Name two metals which are found in nature in the free state.
In the electrolytic refining of a metal M, what would you take as the anode, the cathode and the electrolyte?
Silver metal does not combine easily with oxygen but silver jewellery tarnishes after some time. How?
Explain given equation, what happens when ZnCO3 is heated in the absence of air?
Name two metals which are always found in combined state.
Explain how, mercury is extracted from its sulphide ore (cinnabar). Give equations of the reactions involved.
Which metal is extracted from calamine ore?
The two metals which are extracted by means of electrolytic reduction of their molten salts are:
(a) magnesium and manganese
(b) iron and aluminium
(c) zinc and magnesium
(d) magnesium and aluminium
Which of the following pair of metals exists in their native state in nature?
(a) Ag and Hg
(b) Ag and Zn
(c) Au and Hg
(d) Au and Ag
The metal which is always present in an amalgam is:
(a) iron
(b) aluminium
(c) mercury
(d) magnesium
Give the principles of electromagnetic separation.
Give reasons, why aluminum is used in:
making alloys
Give reasons, why aluminum is used in:
In aluminiothermy
The following question relate to the extraction of aluminium by electrolysis.
Give the equation for the reaction which takes place at the cathode.
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Name : The metal which is liquid at room temperature.
Define roasting.
If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?
The poorest conductor of heat among metals is ____________.
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Identify the substance oxidised and reduced in the above reaction.
