Which metal gives blue ash when its salt is heated with $N a_{2} C O_{3}$ solid and $C o {(N O_{3})}_{2}$ on a charcoal piece?

C u

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M g

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A l

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Z n

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Solution

The correct option is A $A l$
Option (C) is correct.
$A l$ gives blue ash when its salt is heated with $N a_{2} C O_{3}$ solid and $C o {(N O_{3})}_{2}$ on a charcoal piece, forming $C o A l O_{2}$ which is blue. Follow cobalt nitrate-charcoal test.

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Similar questions

A l, C u, F e, M g

Z n

A l, C u, F e, M g

Z n

E_{A l^{3} + / A l}^{0} + - 1.66 V, E_{C u^{2} + / C u}^{0} = + 0.34 V

E_{F e^{2} + / F e}^{0} = - 0.44 V, E_{M g^{2} + / M g}^{0} = - 1.40 V

E_{Z n^{2} + / Z n}^{0} = - 0.76 V

Z n^{2 +}

C u^{2 +}

C u S O_{4}

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