Question

Consider the following statements and arrange in the order of true/false as given in the codes.
$S_1$: In the aluminothermite process, aluminium acts as reducing agent.
$S_2$: The process of extraction of gold involves the formation of $\left[Au\right(C{N}_2){]}^{-}$ and $\left[Zn\right(CN{)}_4{]}^{2-}$.
$S_3$: In the extractive metallurgy of zinc, partial fusion of ZnO with coke is called smelting and reduction of ore to the molten metal is called smelting.

• A. TFF
• B. TTT
• C. TTF
• D. TFT

Answer 1

Answer: (B)

TTT

$S_1:C{r}_2{O}_3+2Al\to \stackrel{+3}{A}{l}_2{O}_3+2Cr.$
$S_2:4Au+8C{n}^{-}+4H_{2}O+O_2\to 4\left[Au\right(CN{)}_2{]}^{-}+4O{H}^{-}$ and $2\left[Au\right(CN{)}_2{]}^{-}+Zn\to \left[Zn\right(CN{)}_4{]}^{2-}+2Au$.
$S_3:$ In the extractive metallurgy of zinc, partial fusion of ZnO with coke is called smelting and reduction of ore to the molten metal is called smelting.