40. Which of the following is a redox reaction?
(1) CaCO3 = CaO + CO2
(2) Fe + CuSO4→ FeSO4 + Cu
(3) CaO + 2HCl → CaCl2 + H2O
(4) NaOH + HCI = NaCl + H2O
Please consider the equal to sign as arrows.
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Answered by
2
Answer:
option third CA + to HCL equal to cacl2 + H2O is a displacement reaction sorry Redox reaction
Answered by
2
Answer:
(4) is the answer
because redox reactions are the reactions in which the addition and removal of oxygen and hydrogen are done respectively.
Please mark it as the brainliest one
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