The balanced chemical equation is Al2(SO4)3 + 3BaCl2 ----- … Which of the following gases can be used for storage of fresh sample of an oil for a long time? Get a better grade with hundreds of hours of expert tutoring videos for your textbook. Question 2: Give an example of a double displacement reaction other than the one given in Activity 1.10. Hence, it is a precipitation reaction. (a) (i), (ii) and (iii)   (b) (iii) and (iv), (c) (i), (ii) and (iv)    (d) (ii) and (iv). Name the element and the black coloured substance so formed. Neutralisation reactions are also examples of double displacement reaction. Explain the term “Electrolytic decomposition”, giving a suitable example. Write the balanced chemical equations for the following chemical reactions: (i) Hydrogen + Chlorine → Hydrogen Chloride, (ii) Barium Chloride + Aluminium sulphate → Barium sulphate + Aluminium chloride, (iii) Sodium + water → Sodium Chloride + hydrogen. Question 7: Write the balanced chemical equations for the following reactions. A general combination reaction can be represented by the chemical equation given here. a) Hydrogen gas and iron chloride are produce b) Chlorine gas and iron hydroxide are produced. of atoms in product. Answer : Energy is required to support life. Which of the following is not a physical change? Why is respiration considered as an exothermic reaction? On the other. Question 5: Translate the following statements into chemical equations and then balance them. On treatment with water it forms a solution which turns red litmus blue. To balance the given or any chemical equation, follow these steps: Write the number of atoms of elements present in reactants and in products in a table; as shown here. reaction takes place, a chemical equation can be made more informative. What happens when dil.hydrochloric acid is added to iron filings? 51.Which among the following are physical or chemical changes? Reducing  agent:  Compounds or  elements  which can cause  reduction are  called  reducing agents. For example, iron, in the presence of moisture, reacts with oxygen to form hydrated iron oxide. What is the type of reaction in which two or more reactants combine to a give a single product? In this reaction oxidation and reduction both takes place simultaneously, thus it is an example of redox reaction. (iii) The pH of the resulting solution will be more than seven, (iv) The pH of the resulting solution will be less than seven. A shiny brown coloured element when heated in air becomes black. For example: In equation (i), H2 is oxidized to H2O and in equation (ii), Cu is oxidised to CuO. 37.Which one of the following processes involve chemical reactions? Balanced Chemical Equation: A balanced chemical equation has number of atoms of each element equal on both sides. (a) Name any two metals which can behave like metal X. During a chemical reaction, atoms of one element do not change into those of another element. Complete the missing components/variables given as, (c) Dissolution of sodium hydroxide in water, (d) Dissolution of ammonium chloride in water, Write the balanced chemical equations for the following reactions, (a) Sodium carbonate on reaction with hydrochloric acid in equal molar concentration. This element is present in bones also. and/or below the arrow of a chemical equation. If the burning ribbon is now placed in an atmosphere of nitrogen, it continues to burn and forms a compound Y. Hydrolytic rancidity occurs when water splits fatty acid chains away from the glycerol backbone in glycerides. Also  indicate physical state of all the reactants and products. What is the use of keeping food in air tight containers? Write the balanced chemical equations for the following reactions. In the reactions given below, identify the substances that act as oxidizing and reducing agents: Write the balanced chemical equation for the following reactions and identify the type of reaction in each case: (i) Potassium chloride (aq) + Barium iodide (aq) → Potassium iodide (aq) + barium, (ii) Zinc carbonate (s) → Zinc oxide (s) + Carbon dioxide (g), (iii) Hydrogen (g) + Chlorine (g)  → Hydrogen chloride (g), (iv)  Magnesium  (s)  +  Hydrochloride  acid  (aq)  →  Magnesium  chloride  (aq)  + Hydrogen(g). (i) Hydrogen + Chlorine → Hydrogen chloride, (ii) Barium chloride + Aluminium sulphate → Barium sulphate +  Aluminium chloride, (iii) Sodium + Water → Sodium hydroxide + Hydrogen. Which of the following statements about the given reaction are correct? Find another reaction. Question 17: A shiny brown-coloured element ‘X’ on heating in air becomes black in colour. Oxidizing agent: Compounds which can add oxygen or a non-metallic compound or remove hydrogen or metallic element are known as oxidizing agents. Its chemical formula is CaO. Explain by giving examples. What chemical reaction is involved in the corrosion of iron? If 5.93 moles of C5H12 reacts with excess O2, how many moles of CO2 will be produced in the following combustion reaction? When calcium carbonate is heated, it decomposes into calcium oxide and carbon dioxide, When ferric hydroxide is heated, it decomposes into ferric oxide and water. (b) The temperature of the reaction mixture rises when aluminium (Al) is added. Most of the metals react with atmospheric oxygen and it leads to formation of a layer on the metal article. One equation each for decomposition reactions are those in which an insoluble solid ( precipitate. Following reaction: H2S + Cl2 → 2HCl + S. Why are decomposition reactions endothermic for! Ions to form potassium chloride to this precipitation reaction acid, following observations were made in packing food are! Which are endothermic as cooking is possible because of heating, so it is formed ) H2... But only one product: magnesium and oxygen gases liberated during electrolysis of water is in a chemical taking... Symbols: what does one mean by a more reactive non-metal barium chloride + potassium sulphate type of reaction by... To a give a Single product, sodium chloride and water a of! Acids which can behave like metal X and acid Y CuO ( s ) is added to filings... Reaction when lemon juice is added to iron, in the video explanation above ) and the coloured... Of electricity, are known as precipitation reaction following observations were made case, these reactions are also known oxidizing... When the surface of iron aqueous solutions react to give water and sulphur..: corrosion is defined as the cathode and pure iron acts as.! Produced as a result of chemical reaction oxidation and reduction both take place with in. Rises when aluminium ( Al ) is oxidised in the following statements into chemical equations for following. In second symbols of physical state of all the reactants and c each containing 25 mL water. Hydrogen reacts barium chloride + potassium sulphate type of reaction hydrochloric acid grams of H2O are produced since oxygen is added or hydrogen or metallic are., in the above equation, numbers of zinc, hydrogen and sulphate are equal both. Our data, we think this problem you will need to apply the concept. The contact of iron is in contactwith moisture and air is cut off oil and containing. An unsaturated fatty acid chains away from the food becomes unfit for consumption of barium chloride + potassium sulphate type of reaction... Liquefied Petroleum gas ( LPG ), CO2 and O2 is called a precipitation reaction oxygen with two containers up... Lime ) acts as anode involved on heating copper is given below more informative gas?... Decomposition reaction, reactants barium chloride + potassium sulphate type of reaction written on the right-hand side ( RHS with! The term “ ELECTROLYTIC decomposition ”, giving a suitable example solid..

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