2. Also, the oxidation number of H increases from0 in H 2 to +1 in H 2 O i.e., H 2 isoxidized to H 2 O. Justify that the following reactions are redox reactions: (a) CuO(s) + H2(g) —–> Cu(s) + H20(g) (b) Fe2O3(s) +3CO(g) —-> 2Fe(s) + 3CO2(g) (c) 4BCl3(g) +3LiAlH4(s) ——> 2B2H6(g) + 3LiCl(s) + 3AlCl3(s) (d) 2K(s) +F2(g)——> 2K+F–(s) Answer: Here, O is removed from CuO, therefore, it is reduced to Cu while O is added to H2 to form H20, therefore, it is oxidised. but no CuSO4. A chemical reaction in which addition of oxygen or removal of hydrogen takes place is called oxidation and the reaction in which addition of hydrogen or removal of oxygen takes place is called reduction. (b) Fe 2 O 3(s) + 3CO (g) → 2Fe (s) + 3CO 2(g) percent yield. Let us consider following examples. According to modern theory, oxidation and reduction are defined in terms of loss and gain of electrons respectively. 8.1 Redox reaction between zinc and aqueous solution of copper nitrate occurring in a beaker. Reason(R): Cu is a less reactive metal. In the first example given above, copper is oxidized while oxygen is reduced, similarly, copper oxide is reduced while hydrogen is oxidized. Assume that CO₂ is also a product of the decomposition. H2 + Cl2 → 2 HCl In this reaction, addition of hydrogen takes place to chlorine. It should be noted that oxidation and reduction reactions take place simultaneously. H2 .. it went form an O.S of 0 to +1. One element gets oxidized and the other gets reduced. This often occurs when a gas or solid is formed. Complete and balance the equation for this reaction in basic solution: NO + Cu^2+ --> NO3^- + Cu^+ help. If you do not know what products are enter reagents only and click 'Balance'. Is this reaction exothermic? CuO (s) + H2 (g) >Cu (s) + H2O (l) (A) It is a redox reaction, because (B) The reducing agent in this reaction is Ans: 5 This reaction takes place in the blast furnace: Fe2O3 (s) + 3CO ( g) > 2Fe (l) + 3CO2 ( g) (A) The word equation for the reaction is (B)It is a redox reaction, because (C) The reducing agent in this reaction is Q2. Many know me as the Ten Year Series book author for JC A-Level H2 Chemistry and O-Level Pure Chemistry. The reaction (ii) is a redox reaction in which PbO2 gets reduced and acts as an oxidizing agent. The given reaction is: CuO+H2 → Cu+H2O C u O + H 2 → C u + H 2 O. Get an answer for 'What kind of reactions are these (redox, double displacement, etc.)? reactions will proceed to completion whenever one of the products is physically removed from the reaction medium. Education Franchise × Contact Us. 1 answer. H2O(s) + F2 (g) ----->HF (g) + HOF (g) Justify that this reaction is a redox reaction . Academic Partner . 1800-212-7858 / 9372462318. So the process is called oxidation. Question Asked Sep 11, 2020 asked Aug 24, 2018 in Chemistry by Sagarmatha (54.4k points) redox reaction; cbse; class-11; 0 votes. Solution for CuO + H2 ⇌ Cu + H2O CO2 + H2 ⇌ 2CO + H2O H2 + F2 ⇌ 2 HF Fe + O2 ⇌ Fe2O3 NaOH + HCl NaCl + H2O 1 Educator answer. (b) Let us write the oxidation number of each element in the given reaction … You would get Cu2+, 2 H+, H2 (g) and SO42-. BaCl, +H2SO4→BASO4->2HCI1.Which of the following is not an example of redox reaction ? We don’t have to guess about such things. Therefore, CuO is reduced to Cu but H2 is oxidised to H20. Which of the following is not an example of redox reaction? 3. 1. 1 answer. In this reaction, H2 H 2 is oxidized because the oxygen is added to H2 H 2 and it is converted into H2O H 2 O . It'd just be H2O in that case... Hope this helps Write the equation so that the coefficients are the smallest set of integers possible. of Cu decreases from + 2 in CuO to 0 in Cu but that of H increases from 0 in H2 to +1 in H20. So the process is called reduction. CuO + H2→ Cu + H2O (ii) Fe2O3 + 3CO → 2Fe + 3CO2 (iii) 2K + F2→ 2KF (iv) BaCl2 + H2SO4→ BaSO4 + 2HCl Solution: Option (iv) is the answer. Further, O.N. to the formation of Cu2+ ions on account of the reaction: Fig. KAHA … (i). Some more examples of redox reactions are given below. R .A. chemistry. Using Cool the dish. chemistry. Science. Reaction stoichiometry could be computed for a balanced equation. Hence, this reaction is a redox reaction. Here copper acts as a reducing agent because it reduces water to hydrogen and in the process itself is oxidized to cupric oxide. Solution for CuO + H2 ⇌ Cu + H2O CO2 + H2 ⇌ 2CO + H2O H2 + F2 ⇌ 2 HF Fe + O2 ⇌ Fe2O3 NaOH + HCl NaCl + H2O Therefore, CuO is reduced to Cu but H2 is oxidised to H20. 2. (A) CuO + H2 → Cu + H2O (B) Fe2O3 + 3CO → 2Fe + 3CO2 (C) 2K + F2 → reactions will proceed to completion whenever one of the products is physically removed from the reaction medium. Following figure shows formation of copper oxide. When gaseous hydrogen and chlorine are heated together, hydrogen chlo- ride gas is formed. Equilibrium greatly favours the products Cu2+ (aq) and Ag(s). CuO + H2→ Cu + H2O (ii) Fe2O3 + 3CO → 2Fe + 3CO2 (iii) 2K + F2→ 2KF (iv) BaCl2 + H2SO4→ BaSO4 + 2HCl Solution: Option (iv) is the answer. Also, the oxidation number of H increases from 0 in H2 to +1 in H2O i.e., H2 is oxidized to H2O. Enter the password that accompanies your username. (8.16) Here, Cu(s) is oxidised to Cu 2+(aq) and Ag+(aq) is reduced to Ag(s). (i). Chemical reactions in which oxygen and/or hydrogen are transferred are called oxidation-reduction, or redox, reactions. Oxidized, another substance is reduced to Cu electrons respectively 0 in H2 +1... 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