What change occurs in the concentrated ore during the roasting process?

  • A
    Sulphide is converted into oxide.
  • B
    Oxide is converted into sulphide.
  • C
    Carbonate is converted into oxide.
  • D
    Hydroxide is converted into oxide.

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Similar Questions

$A$ metal $A$,which is used in the thermite process,when heated with oxygen gives an oxide $B$,which is amphoteric in nature. Identify $A$ and $B$. Write down the reactions of oxide $B$ with $HCl$ and $NaOH$.

An alloy has a low melting point and is,therefore,used for electrical fuses. Name the alloy and write its constituents.

In the electrolytic refining of copper metal,which of the following decreases in weight?

By which method is aluminum metal obtained by the reduction of alumina?

Which of the following metals exist in their native state in nature?
$(i)$ $Au$
$(ii)$ $Cu$
$(iii)$ $Ag$
$(iv)$ $Fe$

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