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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
Which of the following pairs will give displacement reactions?
A man went door to door posing as a goldsmith. He promised to bring back the glitter of old and dull gold ornaments. An unsuspecting lady gave a set of gold bangles to him which he dipped in a particular solution. The bangles sparkled like new but their weight was reduced drastically. The lady was upset, but after a futile argument, the man beat a hasty retreat. Can you play the detective to find out the nature of the solution he had used?
In the extraction of aluminium: Draw the diagram for the extraction of aluminium.
A zinc ore on heating in air forms sulphur dioxide. Describe briefly any two stages involved in the conversion of this concentrated ore into zinc metal.
Explain giving one example, how highly reactive metals (which are high up in the reactivity series) are extracted.
What is meant by the ‘concentration of ore’?
Which metal is extracted from calamine ore?
The metal which can be extracted from the bauxite ore is ______.
The two metals which are extracted by means of electrolytic reduction of their molten salts are ______.
The metal which can be extracted simply by heating the cinnabar ore in air is ______.
Define the following term.
Gangue
The following questions relate to the extraction of aluminium by electrolysis.
Explain why it is necessary to renew the anode periodically.
Complete the incomplete statement with missing word:
Metals form positive ions while non- metals ______.
Name a non- metal that has a metallic luster and sublimes on heating.
Usually ______ ores are subjected to ______ which is done in the absence of air.
Explain the concept of Calcination.
Explain concept with example/explain with the help of a balanced equation.
Calcination
Explain in brief types of extraction of less reactive metals according to their reactivity.
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
The given reaction shows one of the processes to extract the metals like Iron and Manganese.
\[\ce{MnO2(s) + Al(s) -> Mn(l) + Al2O3(s) + Heat}\]
Give the reason why the above reaction is known as a thermite reaction.
