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प्रश्न
Find the odd one out and give its explanation.
पर्याय
Na
K
Cu
Li
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उत्तर
Cu
Explanation-
Copper (Cu) is a less reactive metal while others are highly reactive metals.
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संबंधित प्रश्न
Name the following:
Main ore of aluminium.
Define the Ore.
What chemical process is used for obtaining a metal from its oxide?
Bronze is an alloy of copper and ______.
Define the term mineral.
Define the term gangue.
Name the metal which is extracted from the ore called ‘rock salt’.
Explain how, mercury is extracted from its sulphide ore (cinnabar). Give equations of the reactions involved.
The metal which can be extracted from pyrolusite ore is ______.
Zinc blende ore can be converted into zinc oxide by the process of ______.
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 three objectives achieved during the roasting of ores.
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 words:
Metals are ______ while non-metals are ______ conductors of heat.
Name the following:
The process of heating an ore to a high temperature in the presence of air.
Usually ______ ores are subjected to ______ which is done in the absence of air.
Identify who I am!
Ore of Aluminum- ______
Explain the reactions of nonmetals with water with the help of examples.
Which of the following metals exist in their native state in nature?
- Cu
- Au
- Zn
- Ag
