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Which of the following statements(s) is ...

Which of the following statements(s) is (are) true?

A

In process of the precipitation of silver sodium dicyano argentate (I), the zinc acts as reducing agent as well as complexing agent

B

In process of the roasting the copper pyrites is converted into a mixture of `Cu_(2)S & FeS` which, in trun are partially oxidised

C

Limonite, haematite and magnesite are ores of iron

D

Tin and lead both are extracted from their ores by self-reduction

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The correct Answer is:
A, B
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