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प्रश्न
Complete the incomplete statement with missing word:
Metals form positive ions while non- metals ______.
उत्तर
Metals form positive ions while non- metals form negative ions.
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संबंधित प्रश्न
Name one metal which is extracted by electrolytic reduction.
Name the gas produced when calamine ore is calcined.
Manganese metal is extracted from manganese dioxide by a reduction process by making use of:
(a) carbon
(b) hydrogen
(c) electrolysis
(d) aluminium
Metals X and Y can be recovered from the anode mud left behind after the electrolytic refining of copper metal. The coins made of metal X look new even after several years of use but the coins made of metal Y lose their shine gradually and get blackened soon. When metal X is alloyed with a small amount of metal Y, it becomes hard and hence suitable for making ornaments. What are metals X and Y? Also state the colour of metal X.
State why aluminium is extracted from its oxide by electrolysis while copper, lead, iron by reducing agents and mercury and silver by thermal decomposition.
The following questions relate to the extraction of aluminium by electrolysis.
Explain why it is necessary to renew the anode periodically.
Find the odd one out and give its explanation.
Bauxite reacts with sodium hydroxide in the Bayer’s process.
Write the molecular formulae of the following compound.
Fluorspar
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.
