Discussion
Which of the following is a wrong statement?
Answer: B
The wrong statement is All the ores are not minerals.
A mineral is a naturally occurring substance found in the earth's crust. An ore is a mineral from which a metal can be extracted conveniently and economically. So every ore is a mineral, but not every mineral is an ore; for example, bauxite is both a mineral and the ore of aluminium, while clay contains aluminium yet is not worked as an ore.
That makes 'All the minerals are not ores' and 'All the ores are minerals' correct, and 'From ores, metals can be extracted economically' is the definition of an ore itself. Only the claim that ores are not minerals contradicts the definitions.
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