1.

Which of the following statements is/are true ?A. In process of the precipitation of silver from sodium dicyano argentate (I), the zinc acts as a reducing agent as well as complexing agentB. In the process of roasting , the copper pyrites is converted into a mixture of `Cu_2S` and FeS which, in turn, are partially oxidised.C. Limonite, haematite and magnesite are ores of ironD. Tin and lead both are extracted from their ores by carbon reduction.

Answer» Correct Answer - A,B,D
( C)Magnesite `(MgCO_3)` is ore of magnesium.
(D) `SnO_2+2CtoSn+2CO`
`PbS+3O_2 to 2PbO+2SO_2`
`PbO+CtoPb+CO`


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