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प्रश्न
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
उत्तर
(d) Au and Ag
Gold (Au) and silver (Ag) are highly non-reactive. Hence, they are available in native state in nature and do not react with oxygen or any other element in the atmosphere.
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संबंधित प्रश्न
Name the electrode at which aluminium metal is produced.
Give reasons, why aluminum is used in:
making alloys
Give the chemical formula of :
Cryolite
Write equations for each of the above metal which reacts with water.
In the electrolytic method, a layer of highly active metal is applied to a less active metal.
Gold and silver are active metals.
Explain the reactions of nonmetals with water with the help of examples.
Observe the following diagram and write answers.
- Name the method.
- Write anode reaction and cathode reaction.
- Why fluorspar and cryolite are added in the mixture?
The process in which a carbonate ore is heated strongly in the absence of air to convert it into metal oxide is called ____________.
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore
