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Q.

Which of the following is/are false ?

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a

All minerals are ores

b

Mercury is transported in containers made of iron

c

Calcination is the process of heating the ore strongly in the presence of air

d

Cassiterite is an ore of iron

answer is A.

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Detailed Solution

Ores are the minerals that have higher concentration of certain metals which can be extracted using different methods. All ores are minerals but not all minerals are ores because there are certain minerals that contains unwanted substances in high quantity like sand, stones or so on.

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Which of the following is/are false ?