Question

84. Which of the following is a redox reaction?
(1) CaCO3 = CaO + CO2
(2) H2 + Cl2→ 2HCI
(3) CaO + 2HCl = CaCl2 + H2O
(4) NaOH + HCI =NaCl + H2O

Please consider the equal to signs as arrows.​

Answer 1

Answer:

4. NaOH+HCL =NaCl +H2O