In the reaction represented by the following equation: CuO (s) + H2 (g) -------> Cu (s) + H2O (l)(a) name the substance oxidised (b) name the substance reduced (c) name the oxidising agent (d) name the reducing agent
$CuO\ +\ H_{2}\xrightarrow{Heat} \ Cu\ +\ H_{2} O$
(a) Hydrogen (H2) is oxidised.
(b) Copper oxide (CuO) is reduced.
(c) Copper oxide (CuO) is the oxidising agent.
(d) Hydrogen (H2) is the reducing agent.
Related Articles
- (a) What is a redox reaction? Explain with example.(b) When a magnesium ribbon burns in air with a dazzling flame and forms a white ash, is magnesium oxidised or reduced? Why?(c) In the reaction represented by the equation:MnO2 + 4HCl ----> MnCl2 + 2H2O + Cl2 (i) name the substance oxidised. (ii) name the oxidising agent.(iii) name the substance reduced. (iv) name the reducing agent.
- Identify the substances that are oxidised and the substances which are reduced in the following reactions.(i) 4Na(s) + O2(g) → 2Na2O(s)(ii) CuO (s) + H2(g) → Cu (s) + H2O(l)
- In the following reaction between lead sulphide and hydrogen peroxide:PbS (s) + 4H2O2 (aq) ----> PbSO4 (s) + 4H2O(l)(a) Which substance is reduced?(b) Which substance is oxidised?
- Select the oxidising agent for the following reaction:$H_2S + I_2 \rightarrow 2HI + S$
- Which of the following statements about the given reaction are correct?3Fe (s) + 4H2O (g) → Fe3O4 (s) + 4 H2 (g) (i) Iron metal is getting oxidised (ii) Water is getting reduced (iii) Water is acting as reducing agent (iv) Water is acting as oxidising agent (a) (i), (ii) and (iii) (b) (ii) and (iv) (c) (i), (ii) and (iv) (d) (ii) and (iv)
- Name the hardest natural substance known.
- Zinc oxide reacts with carbon, on heating, to form zinc metal and carbon monoxide. Write a balanced chemical equation for this reaction. Name (i) oxidising agent, and (ii) reducing agent, in this reaction.
- Name the agent which decomposes animal dung into biogas.
- Name the naturally occuring hardest substance known.
- Oxides of moderately reactive metals like Zinc, Iron, Nickel, Tin, Copper etc. are reduced by using(a) Aluminium as reducing agent(b) Sodium as reducing agent (c) Carbon as reducing agent (d) Calcium as reducing agent
- When the concentrated aqueous solution of substance X is electrolysed, then NaOH, Cl2 and H2 are produced. Name the substance X. What is the special name of this process?
- What is an oxidation reaction? Identify in the following reaction (i) the substance oxidised, (ii) the substance reduced:ZnO + C ----> Zn + CO
- Name the substance whose weight produces atmospheric pressure.
- Name of the chemical substance which constitute the genes is?
- Balance the following chemical equations and identify the type of chemical reaction.(a) $Mg(s) + Cl_2 (g) → MgCl_2 (s)$(b) $HgO(s) \xrightarrow{heat} Hg(l) + O_2 (g)$(c) $Na(s) + S(s) \xrightarrow{fused} Na_2S(s)$(d) $TiCl_4 (l) + Mg(s) → Ti(s) + MgCl_2 (s)$(e) $CaO(s) + SiO_2 (s) → CaSiO_3 (s)$(f) $H_2O_2 (l) \xrightarrow{UV} H2O(l) + O_2 (g)$
Kickstart Your Career
Get certified by completing the course
Get Started