Which of the following reaction in the blast furnace is/are endothermic?

CHEMISTRY · Single correct · CBSE · Chemistry · Metals and Non-metals · Metals and Non-metals

Problem

Which of the following reaction in the blast furnace is/are endothermic? (1)

\text{C(s)} + \text{O}_2\text{(g)} \rightleftharpoons \text{CO}_2\text{(g)}

(2)

\text{CO}_2\text{(g)} + \text{C(s)} \rightleftharpoons 2\text{CO(g)}

(3)

\text{CaCO}_3\text{(s)} \rightleftharpoons \text{CaO(s)} + \text{CO}_2\text{(g)}

(4)

\text{Fe}_2\text{O}_3\text{(s)} + 3\text{CO(g)} \rightleftharpoons 2\text{Fe(l)} + 3\text{CO}_2\text{(g)}