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Mr Verma, the science teacher, provided following information about the four samples i.e. P, Q, R and S.
Now, he told the students to identify them. The correct identifications are

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R is iron and S is copper

Q is coal and S is copper

P is copper and Q is sulphur

Q is sulphur and R is coal

answer is B.

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Detailed Solution

According to properties of metals and non-metals, Q is coal as it does not show malleability and S is Copper as it is conductor of electricity

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