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General Principles and processes of Isolation of Elements
easy
A sulphide ore first converted into its oxide before reduction. This is done because
A
A sulphide ore cannot be reduced to metal at all
B
No reducing agent is found suitable for reducing a sulphide ore
C
The enthalpy of formation of $CO_2$ is more than that of $CS_2$
D
A metal oxide is generally less stable than the metal sulphide
Solution
A metal oxide is generally less stable than the metal sulfide. Thus, reduction of metal oxide is easier than the reduction of metal sulfide. Hence, a sulfide ore is first converted into it's oxide before reduction. This process is known as roasting.
Standard 12
Chemistry
Similar Questions
Match items of Column $I$ with the items of Column $II$ and assign the correct code :
| Column $I$ | Column $II$ |
| $(A)$ Cyanide process | $(i)$ Ultrapure $Ge$ |
| $(B)$ Froth floatation | $(ii)$ Dressing of $ZnS$ process |
| $(C)$ Electrolytic | $(iii)$ Extraction of $Al$ reduction |
| $(D)$ Zone refining | $(iv)$ Extraction of $Au$ |
| $(v)$ Purification of $Ni$ |
code :
