Class 12

19. General principles and processes of isolation of elements question bank (Chemistry)

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Q1.

The principal ores of silver are argentite,horn silver and pyrargyrite. Their formulas respectively are:

(A)
$Ag_2S, AgCl$ and $AgSbS_2$
(B)
$AgCl, AgSbS_2$ and $Ag_2S$
(C)
$AgSbS_2, Ag_2S$ and $AgCl$
(D)
$AgCl, Ag_2S$ and $AgSbS_2$
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Q2.

In the extraction of copper,the ore used is:

(A)
$Cu_2S$
(B)
Pyrites
(C)
Silver argentocyanide
(D)
$CuFeS_2$
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