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प्रश्न
Extraction of moderately reactive elements is done by _______ and _______ method.
पर्याय
roasting and calcination
roasting and reduction
separation and calcination
none of these
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उत्तर
Extraction of moderately reactive elements is done by roasting and calcination method.
संबंधित प्रश्न
Name two metals which are highly resistant to corrosion.
Name one metal which is extracted by:
Reduction with carbon.
The non-metal present in steel is ______.
Name the chemical compound which is electrolysed in molten state to obtain aluminium metal. Which gas is evolved during this process?
Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula.
Which gas is produced during the extraction of aluminium? At which electrode is this gas produced?
Which metal is extracted from bauxite ore?
Which metal is extracted from calamine ore?
An ore of manganese metal is ______.
Zinc blende ore can be converted into zinc oxide by the process of ______.
State why aluminium is extracted from its oxide by electrolysis while copper, lead, iron by reducing agents and mercury and silver by thermal decomposition.
Define the following term.
Mineral
Define the term:
Slag
Complete the incomplete statement with missing word:
Metals form positive ions while non- metals ______.
If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?
Write the name.
Strongly heating carbonate ores in insufficient air -
Explain concept with example/explain with the help of a balanced equation.
Ionic bond and ionic compounds
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
- Given below are the steps for extraction of copper from its ore. Write the reaction involved.
- Roasting of copper (I) sulphide
- Reduction of copper (I) oxide with copper (I) sulphide.
- Electrolytic refining
- Draw a neat and well labelled diagram for electrolytic refining of copper
Two ores A and B were taken. On heating ore A gives CO2 whereas, ore B gives SO2. What steps will you take to convert them into metals?
