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In extractive metallurgy of zinc, parti...

In extractive metallurgy of zinc, partial fusion of `ZnO` with coke is called ____ and reduction of the ore to moleten metal is called ______(smelting, calcining, roasting, sintering).

A

T F F

B

TTT

C

TTF

D

TFT

Text Solution

Verified by Experts

The correct Answer is:
B
`S_1:Cr_2O_3+2Altooverset(+3)(Al_2)O_3+2Cr`
`S_2:2Au+4CN^(-)+2H_2O+1/2O_2to2[Au(CN)_2]^(-)to2OH^(-),2[Au(CN)_2]^(-)+Zn=[Zn(CN)_4]^(2-)+2Au`
`S_3`:True statement
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