In alumino-thermite process, aluminium is used as :

Oxidising agent

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Flux

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Reducing agent

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Solder

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Solution

The correct option is A Reducing agent
Alumino-thermite process: Certain Oxides of Mn, Cr do not reduce by carbon due to very high melting point. They are reduced by Al.

$C r_{2} O_{3} + 2 A l \to 2 C r + A l_{2} O_{3}$
$3 M n_{3} O_{4} + 8 A l \to 9 M n + 4 A l_{2} O_{3}$

So Al is used as reducing agent.

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