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प्रश्न
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.
उत्तर
1.Roasting: Zinc blende ore is subjected to roasting, i.e., it is heated in the presence of excess air. This converts zinc sulphide ore to zinc oxide. The reaction involved is:
2. Reduction: Zinc oxide is then reduced by coke (carbon). When zinc oxide is heated with coke, carbon acts as reducing agent and reduces zinc oxide to zinc metal.
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संबंधित प्रश्न
Name two metals which are found in nature in the free state.
Give reasons.
Carbonate and sulphide ores are usually converted into oxides during the process of extraction.
What is meant by the 'concentration of ore'?
Name two ores of zinc. Write the names of the chemical compounds present in them and give their chemical formulae.
Name one ore of mercury. Which mercury compound is present in this ore? Write its chemical formula.
State one observation for each of the following :
Copper sulphate solution is electrolysed using copper electrodes.
What is meant by concentration of ores?
Complete the incomplete statement with missing word:
Non-metals form acidic oxides while metals form ______.
Find the odd one out and give its explanation.
Care must be taken while diluting concentrated nitric acid with water. Why?
