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General Principles and processes of Isolation of Elements
medium
Chromite ore $\xrightarrow{{{\text{N}}{{\text{a}}_2}{\text{C}}{{\text{O}}_3}{\text{ + }}{{\text{O}}_2}{\text{ }}}}A\xrightarrow[{NaOH}]{{{H_2}S{O_4}}}B$ Correct among the following are
A
$A = Cr_2O_4^{2-}$
B
$B = Na_2Cr_2O_7$
C
$A = Na_2CrO_4$
D
Both $(B)$ & $(C)$
Solution
$\mathrm{FeO} \cdot \mathrm{Cr}_{2} \mathrm{O}_{3}+\mathrm{Na}_{2} \mathrm{CO}_{3}+\mathrm{O}_{2}$ $ \to {\text{N}}{{\text{a}}_2}{\text{Cr}}{{\text{O}}_4}\underset{{{\text{NaOH}}}}{\overset{{{{\text{H}}_2}{\text{S}}{{\text{O}}_4}}}{\longleftrightarrow}}{\text{N}}{{\text{a}}_2}{\text{C}}{{\text{r}}_2}{{\text{O}}_7}$
Standard 12
Chemistry
Similar Questions
Match List$-I$ and List|$-II.$
|
List$-I$ (Metal) |
List$-II$ (Ores) |
||
| $(a)$ |
Aluminium |
$(i)$ | Siderite |
| $(b)$ | Copper | $(ii)$ | Calamine |
| $(c)$ | Norethindrone | $(iii)$ | Kaolinite |
| $(d)$ | Zinc | $(iv)$ |
Malachite |
Choose the correct answer from the options given below:
