Multiple Choice Question Answer XXXI — task. Science CBSE, Class 10.

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1. There are four types of reactions given

$Fe_2O_3$ +

$2Al$

$\xrightarrow[]{Heat}$

$2Fe$ +

$Al_2O_3$

$CuO$ +

$H_2$

$\xrightarrow[]{}$

$Cu$ +

$H_2O$

$H_2S$ +

$SO_2$

$\xrightarrow[]{}$

$3S$ +

$2H_2O$

$Mg$ +

$O_2$

$\xrightarrow[]{}$

$MgO$

The reducing agents in I & II and oxidizing agents in III & IV are

2. Oxidation and reduction are

Answer variants:

$Al$ ,

$H_2$ , &

$SO_2$ ,

$O_2$

$Al$ ,

$CuO$ , &

$H_2S$ ,

$O_2$

Loss of electrons & gain of electrons respectively

Loss of electrons & loss of electrons

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