The metals like Na- K- Ca- Al are obtained by-roastingelectrolytic reductioncalcinationsimple heating

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Extracting of Metals Towards the Top of the Activity Series

The metals li...

Question

The metals like Na, K, Ca, Al are obtained by:

roasting

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electrolytic reduction

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calcination

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simple heating

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Solution

The correct option is B electrolytic reduction
Metals like sodium (Na), magnesium (Mg), calcium (Ca) and aluminium (Al) are very reactive. So, they are not available in free state and cannot be obtained from their compounds by simple heating. These metals cannot be obtained by roasting or calcination either. This is because these metals have more affinity for oxygen than carbon. Therefore, these metals are obtained only by electrolytic reduction.

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Similar questions

Q. Out of the following, the number of metals that cannot be obtained by electrolysis of the aqueous solution of their salts are
Ag, Mg, Cu, Al, Cr, Au, Ca, Na

Q. The metals like Na, K, Ca, Al are obtained by:

The metals like Na, K, Ca, Al cannot be obtained from their compounds by heating with carbon because their metals have more affinity for oxygen than carbon.

Q. State True or False:
Metals like Na, K, Ca, Al cannot be obtained from their compounds by heating with carbon because their metals have a higher affinity for oxygen than they do for carbon.

Choose the metals, from the following, that are obtained by electrolysis of their salts:

$A l, N a, C u, A g, M g, C a$

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