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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
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
Name one metal which is extracted by:
Reduction with carbon.
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.
Name one ore of copper (other than cuprite). Which compound of copper is present in this ore? Also, write its chemical formula.
Name the gas evolved when cinnabar ore is roasted.
Name two metals which are found in nature mainly in the free state (as metallic elements).
Which metal is extracted from cinnabar ore?
Name the metal which is extracted from haematite ore.
An ore of manganese metal is ______.
The metal which can be extracted from the bauxite ore is ______.
Zinc blende ore can be converted into zinc oxide by the process of ______.
Give reasons, why aluminum is used in:
wrapping chocolates
Give the chemical formula of :
Bauxite
Which method of refining is used to get 99.8% pure aluminium?
Complete the incomplete statement with missing word:
Metals are malleable while non-metals are ______.
Carbon cannot reduce the oxides of sodium, magnesium, and aluminum to their respective metals. Why? Where are these metals placed in the reactivity series? How are these metals obtained from their ores? Take an example to explain the process of extraction along with chemical equations.
_______ is the least reactive metal.
Explain the following reaction with the balanced equation.
Chlorine dissolved in water
Explain concept with example/explain with the help of a balanced equation.
Ionic bond and ionic compounds
The highly reactive metals like Sodium, Potassium, Magnesium, etc. are extracted by the ____________.
