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प्रश्न
Fill in the following blank with suitable word:
The rocky material found with ores is called.............
उत्तर
The rocky material found with ores is called gangue.
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संबंधित प्रश्न
What chemical process is used for obtaining a metal from its oxide?
Calamine ore can be used to extract one of the following metals. This metal is:
(a) copper
(b) mercury
(c) aluminium
(d) zinc
To protect iron from rusting, it is coated with a thin layer of zinc. Name the process.
Answer the following question :
What is the difference between calcination and roasting.
Define roasting.
Explain the concept of Calcination.
Observe the figure and answer the following.
- Write the name of the method.
- What is used as anode and cathode in this method?
- Write the molecular formula and use of cryolite.
- Write anode reaction.
- Write cathode reaction.
Which of the following ore is concentrated by the Froth floatation process?
During extraction of metals, electolytic refining is used to obtain pure metals.
(a) Which material will be used as anode and cathode for refining of silver metal by this process?
(b) Suggest a suitable electrolyte also.
(c) In this electrolytic cell, where do we get pure silver after passing electric current?
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 a reason why Aluminium is preferably used in thermite reactions.
