- Home
- Standard 12
- Chemistry
Give the correct order of initials $T$ or $F$ for following statements. Use $T$ if statement is true and $F$ if it is false.
$(i)$ In Gold schmidt thermite process aluminium acts as a reducing agent .
$(ii)$ $Mg$ is extracted by electrolysis of aq. solution of $MgCl_2$
$(iii)$ Extraction of $Pb$ is possible by carbon reduction method
$(iv)$ Red Bauxite is purified by Serpeck's process
$TTTF$
$TFFT$
$FTTT$
$TFTF$
Solution
$(i)$ ${\text{C}}{{\text{r}}_2}{{\text{O}}_3} + 2{\text{Al}}({\text{R}}{\text{.A}}.)\xrightarrow{\Delta }{\text{A}}{{\text{l}}_2}{{\text{O}}_3} + 2{\text{Cr}}$ ; $\Delta H=-\mathrm{ve}$
$(ii)$ $Mg$ is extracted by electrolysis of fused $\mathrm{MgCl}_{2}$ and $NaCl$
$(iii)$ ${\text{PbS}} + \frac{3}{2}{{\text{O}}_2} \to {\text{PbO}} + {\text{S}}{{\text{O}}_2}$
${\text{PbO}} + {\text{C}} \to {\text{Pb}} + {\text{CO}}$
$(iv)$ Red Bauxite is purified by Baeyer's process
