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?

Academic Chemistry NCERT Class 10

(a) Hydrogen peroxide (H₂O₂) is reduced to H₂O, as oxygen is removed from H₂O₂

(b) Lead Sulphide (PbS) is oxidised to PbSO₄, as oxygen is added to PbS.

Tutorialspoint

Simply Easy Learning

Updated on: 10-Oct-2022

45 Views

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
When SO2 gas is passed through saturated solution of H2S, the following reaction occurs:SO2 + 2H2S -----> 2H2O + 3S In this reaction, which substance is oxidised and which one is reduced?
Which of the statements about the reaction below are incorrect?2 PbO(s) + C(s) → 2Pb (s) + CO2(g)(a) Lead is getting reduced.(b) Carbon dioxide is getting oxidised.(c) Carbon is getting oxidised.(d) Lead oxide is getting reduced(i) (a) and (b)(ii) (a) and (c)(iii) (a), (b) and (c)(iv) All
The following reaction takes place when the aluminium powder is heated with MnO23 MnO2 (s) + 4 Al (s) → 3 Mn (l) + 2 Al2O3 (l) + Heat(a) Is aluminium getting reduced? (b) Is MnO2 getting oxidised?
What is an oxidation reaction? Identify in the following reaction (i) the substance oxidised, (ii) the substance reduced:ZnO + C ----> Zn + CO
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)
Write the balanced chemical equation for the following and identify the type of reaction in each case :(a) Potassium bromide (aq) + Barium iodide (aq) → Potassium iodide (aq) + Barium(b) Zinc carbonate(s) → Zinc oxide (s) + Carbon dioxide (g) bromide(s)(c) Hydrogen (g) + Chloride (g) → Hydrogen chloride (g)(d) Magnesium (s) + Hydrochloric acid (aq) → Magnesium chloride (aq) + Hydrogen (g)
A substance which reacts with oxygen giving heat is called a combustible substance. Which one of the following is a combustible substance?Iron nailGlassStone pieceWood
Which of the following is not a combustible substance?CamphorGlassStrawAlcohol
Consider the reaction: KBr (aq) + AgNO3 (aq) --------> KNO3 (aq) + AgBr (s)This is an example of:(a) decomposition reaction (b) combination reaction(c) double displacement reaction(d) displacement reaction
Complete and balance the following chemical equations: (a) $Zn(s) + HCl(aq) →$ (b) $Na_2CO_3(s) + HCl (aq) →$ (c) $NaHCO_3(s) + 6 HCl →$(d) $NaOH(aq) + HCl(aq) →$(e) $CuO(s) + HCl (aq) →$p>
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)
(a) Define the following in terms of gain or loss of hydrogen with one example each:(i) oxidation (ii) reduction(b) When a magnesium ribbon is heated, it burns in air to form magnesium oxide. Write a balanced chemical equation for this reaction. Name (i) substance oxidised, and (ii) substance reduced.
(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.
A solid substance P which is very hard is used in the construction of many buildings, especially flooring. When substance P is heated strongly, it decomposes to form another solid Q and a gas R is given out. Solid Q reacts with water with the release of a lot of heat to form a substance S. When gas R is passed into a clear solution of substance S, then a white precipitate of substance T is formed. The substance T has the same chemical composition as starting substance P.(a) What is substance P? Write its common name as well as chemical formula.(b)What is substance Q?(c)What is gas R?(d)What is substance S? What is its clear solution known as?(e)What is substance T? Name any two natural forms in which substance T occurs in nature?

Kickstart Your Career

Get certified by completing the course

Get Started

Advertisements