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NTA Abhyas NEET2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

which of the above statements are correct? Extraction of metal from the ore cassiterite involves ( 1 ) Self- reduction of a sulphide ore ( 2 ) Carbon reduction of an oxide are ( 3 ) Removal of iron impurity ( 4 ) Removal of copper impurity

Options

  1. A1 , 3 , 4
  2. B2 , 3 , 4
  3. C2 , 3
  4. D3 , 4

Correct answer

B. 2 , 3 , 4

Step-by-step solution

The ore cassiterite contains the impurity of F e , M n , W and traces of Cu so removal of Fe and Cu etc are needed hence 3 and 4 are correct. As it is reduced by carbon reduction method so 2 is correct and 1 is wrong. S n O 2 + 2 C → 2 C O + S n

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