Answer: (vii) Once the test tubes are filled with the respective gases, remove them carefully. The diagram below represents an experiment conducted to prove the importance of a factor in photosynthesis. CaCO3(s) \(\underrightarrow { heat }\) CaO(s) + CO2(g) Why should a magnesium ribbon be cleaned before burning in air? According to the Law of Conservation of Mass, mass can neither be created nor destroyed in a chemical reaction. (vi) Evolution of a gas For example, if on mixing two substances a gas is evolved, then we can say that a chemical reaction has taken place. C + O2 → CO2 (g) + heat, Endothermic reaction: A chemical reaction in which heat energy is absorbed. Balanced Chemical Equation for Photosynthesis Working out space – Try to balance the equation (You can only times a whole molecule, you cannot change the small numbers) Chemical Equation Of Photosynthesis Class 10 (a) Fe2O3(s) + 2Al(s) + AI2O3(s) + 2Fe(l) + Heat Displacement reaction In this reaction, carbon is combined with oxygen. The observations of the activities mentioned determine whether a chemical reaction has taken place. The Role Of The Leaf In Photosynthesis Worksheet Edplace. Question 11. State which is more reactive, Mn or Al and why? Writing the symbols of physical states of substances in a chemical equation: (iv) Hydrogen (H2 gas burns with a pop sound when a burning candle is brought near it. Equation 6 CO 2 + 6 H 2 O → C 6 H 12 O 6 + 6 O 2 (iii) CS2 + 3O2 → CO2 + 2SO2 (i) Combination Reaction: Reactions in which two or more reactants combine to form one product are called Combination Reactions. Identify the mistake and balance the equation. (iv) V2O2 Photosynthesis is the physico-chemical process by which plants can convert light energy into chemical energy, in the form of carbohydrate from simple inorganic substances like atmospheric carbon dioxide and water. Question 26. “An aqueous solution of ferrous sulphate reacts with an aqueous solution of sodium hydroxide to form a precipitate of ferrous hydroxide and sodium sulphate remains in solution.” Corrosion of Silver Metal: The surface of silver metal gets tarnished (becomes dull) on exposure to air, due to the formation of a coating of black silver sulphide(Ag2S) on its surface by the action of H2S gas present in the air. On the other hand, copper (Cu) cannot displace iron (Fe), so reaction, (ii) 2Na(s) + 2H4O(l) → 2NaOH(aq), Question 7. The first part of the chapter, Chemical Reactions and Equations focuses on the concept of chemical equations. (b) Unbalanced Chemical Equation: If the number of atoms of each element in reactants is not equal to the number of atoms of each element present in the product, then the chemical equation is called Unbalanced Chemical Equation. (iii) Change in state of substance: The combustion reaction of candle wax is characterised by a change in state from solid to liquid and gas (because the wax is a solid, water formed by the combustion of wax is a liquid at room temperature whereas, carbon dioxide produced by the combustion of wax is a gas). Answer: (ii) dilute HCI 2Mg + O2 → 2MgO. Answer: In this equation, oxygen should be in molecular form (O 2). The substance which gets reduced is the oxidizing agent. Balanced Chemical Equation For Photosynthesis Video Lesson. Balanced Chemical Equations. NCERT Solutions for Chapter 1 Chemical Reactions and Equations from Class 10. (a) Evaporation of petrol According to new CBSE Exam Pattern, MCQ Questions for Class 10 Science pdf Carries 20 Marks. Thus, blue colour of the solution fades and copper metal gets deposited. Most of the decomposition reactions are exothermic. (iv) When lead is treated with hydrochloric acid, bubbles of hydrogen gas are evolved. Therefore, fire flies glow at night. Answer: Question 1. If you have any query regarding NCERT Solutions for Class 10 Science Chapter 1 Chemical Reactions and Equations, drop a comment below and we will get back to you at the earliest. During the reaction of some metals with dilute hydrochloric acid, following observations were made : Question 1. Answer: Liquid state is represented by symbol (l). 4. Must Read: Manufacturing Industries Class 10. (ii) 3Mg(s) + N2 (g) ∆ ➝ Mg3 N2(s) The physiological process being studied is Photosynthesisii. Answer: Answer : Magnesium is an extremely reactive metal. This consists of 1 mark Questions, 3 Mark Numericals Questions, 5 Marks Numerical Questions and previous year questions from Chemical Reactions and Equations Chapter. Consider the following reactions : answered Jul 23, 2020 by Abha01 (51.5k points) selected Jul 23, 2020 by RupaBharti . Question 6. What type of reaction is represented by the digestion of food in our body? In this page, you can find CBSE Class 10 Science Chapter 1 Extra Questions and Answers Chemical Reactions and Equations Pdf free download, NCERT Extra Questions for Class 10 Science will make your practice complete. The substance which removes oxygen is also called a Reducing agent. The rusting of iron is a redox reaction. The balanced equation for this is as follows: Which is the equation used in black and white photography. (iii) The reaction of sodium metal is found to be highly explosive. Solid calcium oxide was taken in a container and water was added slowly to it Write a balanced equation for these reactions Answer: Example: 2Pb(NO3)2(s) \(\underrightarrow { heat }\) 2PbO(s) + 4NO2(g) + O2(g), Electrolytic Decomposition: Reactions in which compounds decompose into simpler compounds because of passing of electricity, are known as Electrolytic Decomposition. Hydrogen + Oxygen → Water Photosynthesis is a process by which plants or organisms like algae and bacteria harness the solar energy in presence of carbon dioxide (CO2) and water (H2O) and convert it into chemical energy. Like photosynthesis seems to be highly explosive -- -- - > C6H12O6 + 6O2 diagram of an experimental to... One atom on the RHS by 4 iron ( iii ) carbon disulphide in..., water and liberates carbon dioxide + energy when hydrochloric acid, it decomposes into hydrogen and oxygen released. 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