Copper matte contains

Which of the following statement(s) is/are incorrect ? I. Zinc can be extracted by self-reduction. II. A depressant prevents certain type of particel of come in the froth . III. Copper matte contains ZnS and Cu_2S . IV. The solidified copper obtained from reverberatory furnance has blistered appearance due to evolution of SO_2 during the extraction . The option containing incorrect statements is

When copper ore is mixed with silica in a reverberatory furnace, copper matte is produced. The copper matter contains__________

When copper ore is mixed with silica in a reverberatory furnace, copper matte is produced. The copper matter contains__________

Copper matte consists of:-

Copper matte consists of:-

Copper matte consists of:-

The composition of 'Copper Matte' is :