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General Principles and processes of Isolation of Elements
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For extraction of sodium from $NaCl,$ the electrolytic mixture $NaCl + Na_3AlF_6 + CaCl_2$ is used. During extraction process, only sodium is deposited on cathode but $K$ and $Ca$ do not because
A
$Na$ is more reactive than $K$ and $Ca$
B
$Na$ is less reactive than $K$ and $Ca$
C
$NaCl$ is less stable than $Na_3AlF_6$ and $CaCl_2$
D
the discharge potential of $Na^+$ is less than that of $K^+$ and $Ca^{2+}$ ions.
Solution
As $K$ and $Ca$ are more reactive than $Na$ and they have less discharge potential than $Na$ so they will not discharge.
Standard 12
Chemistry
Similar Questions
Match Column $-I$ with Column $-II$ and select the correct answer using the codes given below
| Column $-I$ (metals) | Column $-II$ (Ores) |
| $(A)$ Tin | $(1)$ Calamine |
| $(B)$ Zinc | $(2)$ Cassiterite |
| $(C)$ Titanium | $ (3)$ Cerrusite |
| $(D)$ Lead | $(4)$ Rutile |
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Match the list
| $I$ | $II$ | ||
| $(A)$ | Van arkel method | $(P)$ | Purification of titanium |
| $(B)$ | Solvay process | $(Q)$ | Manufacture of $Na_2CO_3$ |
| $(C)$ | Bassemerisation | $(R)$ | Reduction of aluminium |
| $(D)$ | Holl Herault's process | $(S)$ | Reduction of cupper |
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