1.

Which of the following reaction in the blast furnaces are endothermic ?

Answer»

`C_((s))+O_(2(g)) hArr CO_(2(g))`
`CO_(2(g))+C_((s)) hArr 2CO_((g))`
`CaCO_(3(s)) hArr CaO_((s))+CO_(2(g))`
`Fe_(2)O_(3(s))+3CO_((g)) hArr 2Fe(l)+3CO_(2(g))`

Solution :REDUCTION of `CO_(2)` to C is endothermic `CO_(2)+C to 2CO`
Decomposition of `CaCO_(3)` is endothermic `CaCO_(3) to CAO+CO_(3)`


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