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Question

In which of the following isolations is no reducing agent required?

A
Iron from haematire
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B
Tin from tin oxide
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C
Mercury from cinnabar
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D
Zine from zinc blende
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Solution

The correct option is B Mercury from cinnabar
Cinnabar ore is relatively concentrated, it can be processed directly without any intermediate steps to remove waste material and without requirement of a reducing agent.

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