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प्रश्न
_______ is the least reactive metal.
विकल्प
silver
sodium
zinc
gold
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उत्तर
Gold is the least reactive metal.
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संबंधित प्रश्न
Why are the metals like Na, K, Ca and Mg never found in their free state in nature?
Name two metals which occur in nature in free state as well as in combined state.
Name two metals which are always found in combined state.
Name three other metals which are extracted in a manner similar to sodium.
Which gas is produced during the extraction of aluminium? At which electrode is this gas produced?
Calamine ore can be used to extract one of the following metals. This metal is:
(a) copper
(b) mercury
(c) aluminium
(d) zinc
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
Calamine ore can be converted into zinc oxide by the process of:
(a) dehydration
(b) roasting
(c) calcination
(d) sulphonation
State why aluminium is extracted from its oxide by electrolysis while copper, lead, iron by reducing agents and mercury and silver by thermal decomposition.
Name the following:
The mixture of materials fed into a furnace to extract a metal.
Name the following:
The substance added to get rid of gangue in the extraction of metal.
How are metals refined by the electrolytic methods?
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Name a non- metal that has a metallic luster and sublimes on heating.
To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.
Which one of the following is not true of metal :
Metals form non-polar covalent compounds
Which one of the following is not true of metal :
Metal will have 1 or 2 or 3 electrons in their valence shell.
Explain the concept of Calcination.
Explain the following reaction with the balanced equation.
Zinc oxide is treated with carbon
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.
