Reduction is defined as the process of ............, gaining protons., losing electrons., gaining electrons., increasing the percentage of oxygen in a substance., The substance that loses one or more electrons during a chemical reaction is called a/an ............, oxidizing agent., reducing agent., catalyst., helping agent., All of the following describe the reaction of magnesium with bromine according to the equation: Mg(s) + Br2(l) ⟶ MgBr2(s) , except that ............, it is a direct combination reaction., the magnesium atom is oxidized to a positive magnesium ion., bromine is the oxidizing agent., magnesium is the oxidizing agent., The half-reaction: F- ⟶ F + e- represents a process of ............, decomposition., oxidation., reduction., replacement., When a sodium atom loses the electron in its outermost energy level during a chemical reaction, it ..................., is oxidized only., is reduced only., is oxidized and acts as a reducing agent., is reduced and acts as an oxidizing agent., The process: Cu2+ + 2e- ⟶Cu represents ............, a redox reaction., a direct combination reaction., an oxidation half-reaction., a reduction half-reaction., When zinc is added to copper sulphate solution, ............, copper replaces zinc, and zinc is deposited., the zinc atom gains two electrons and is converted into a negative zinc ion., the positive copper ion gains two electrons and is converted into a neutral copper atom., the zinc atom loses two electrons and is considered as an oxidizing agent., In the reaction of sodium and chlorine: Cl2(g) +2Na(s)⟶2Na+Cl-(s) Which of the following is reduced during the reaction?, Sodium ions., Chlorine atoms., Sodium atoms., Chloride ions., In the reaction: 2Mg+O2 →2MgO, the oxidizing agent is ............, Mg, O2-, Mg+2, O2, Which of the following statements describes the reaction: X+Y (Heating ) → X+2 + Y-2 ?, The substance (X) is oxidized and acts as a reducing agent., The substance (Y) is oxidized and acts as an oxidizing agent., The substance (Y) is reduced and acts as a reducing agent., The substance (X) is reduced and acts as an oxidizing agent., In the reaction: Zn0(s)+CuSO4(aq) ⟶ ZnSO4(aq) +Cu0(s) Which of the following undergoes neither oxidation nor reduction?, Zn0, Cu0, Cu2+, SO42-, When iron is added to a test tube containing dilute hydrochloric acid, it ............, is oxidized and becomes a reducing agent., is reduced and becomes an oxidizing agent., does not react and deposits at the bottom of the tube., is oxidized and gains electrons.

Oxidation and reduction

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