In a displacement reaction, a more reactive element displaces a less reactive element from its solution. Why do we apply paint on iron articles? Hence, (i) is the correct option. When quick lime is mixed with water, The following reaction takes place : Quick lime (Calcium oxide) + water à Calcium hydroxide (Slaked lime). Endothermic reactions: Those reactions In which heat is absorbed during the reaction are called endothermic reactions. 2H2S (g) + 3O2(g) -> 2H2O (l) + 2SO2 (g). Aluminum chloride hydroxide (AlCl2(OH)) Molecular Weight: 115.9 g/mol. Write a balanced chemical equation on with state symbols for the following reactions. Balance the following chemical equations: Nitric acid + Calcium hydroxide -> Calcium nitrate + water, Sodium hydroxide + Sulphuric acid -> Sodium Sulphate + Water, Sodium Chloride + Silver nitrate -> Silver Chloride + Sodium nitrate, Barium chloride + Sulphuric acid -> Barium Sulphate + Hydrochloric acid. Magnesium is very reactive Metal. Sol. Explain. What is the difference between the displacement and double displacement reaction? Write one equation each for decomposition reactions where energy is supplied in the form of heat, light and electricity. Q2. (ii).Barium chloride + Aluminium Sulphate –> Barium Sulphate + Aluminium Chloride. SOLUTION: Ans : In the reaction of silver nitrate and sodium chloride, the silver exchanges its nitrate ions with chloride ions of sodium chloride and forms a precipitate of silver chloride. Tick the correct answer. Ans. Q12. Q5.Translate the following statements into chemical equations and then balance them. (a) Hydrogen gas combines with nitrogen to form ammonia. Chemical equation for double displacement. Its chemical formula is written as AlCl3. Free PDF Download of CBSE Class 10 Science Chapter 3 Metals and Non-Metals Multiple Choice Questions with Answers. Q15. Nitrogen is unreactive gas as compared to oxygen. About 17-30% of the aluminum chloride formed is absorbed and is rapidly excreted … )+3H_{ 2 }(g)\) So, dil. Therefore, during the electrolysis of water the amount of hydrogen gas collected in one of the test tubes is double than that of the produced and collected in the other test tube. (a)Dilute HCl: Aluminium reacts with dil. (d) Barium chloride + Potassium sulphate ->  Barium Sulphate + Potassium chloride. Aluminum chloride is an ionic salt with the formula AlCl 3. (a) Hydrogen gas and iron chloride are produced. Ans.3BaCl2 (aq) + Al2(SO4)3(aq) -> 2AICI3 (aq) + 3BaSO4(s). In compounds, the oxidation numbers must add together to become 0. This is because according to the law of conservation of mass , mass can neither be created nor destroyed. Q1. BaCl2(aq) + Na2SO4(aq) -> BaSO4 (s)+2NaCl (aq). (ii) When silver nitrate is added to an aqueous solution of sodium chloride, a white precipitate of silver chloride (AgCl), which is soluble in NH4OH is obtained. In the presence of enzymes as catalyst in our body , starch decomposes into simple sugars whereas proteins decomposes to form simpler molecules called amino acids. (c)   Aluminium + Copper Chloride -> Aluminium chloride + Copper. Potassium is the most reactive metal and platinum is the least reactive metal. This is due to attack of oxygen, carbon dioxide and water vapours of the air on copper forming green coloured basic copper carbonate. Write the balanced chemical equation to the following and identity the type of reaction in each case. Water contains two parts of hydrogen and one part oxygen. Hence, H2 has been oxidised to form  H2O. HCl cannot be kept in aluminium container. (i) Oxidation It is a process in which a substance gains oxygen, e.g. An equation in which the numbers of atoms of each element on the two sides of the equation is equal is called balanced chemical equation. ncert solutions for class 10 social science history in hindi. Q19. But such reaction is prevented in the presence of nitrogen. 2KBr (aq) +Bal2 (aq) -> 2KI (aq) + BaBr2 (s), (b) Zinc carbonate (s) -> Zinc oxide (s) + Carbon dioxide (g), (c) Hydrogen (g) + Chlorine (g) -> Hydrogen chloride (g). Ans. (d) Potassium metal reacts with water to give potassium hydroxide and … Ans. )\longrightarrow 2AlCl_{ 3 }(aq. Cu (S) + 2AgNO3(aq) -> Cu (NO3)2(aq) + 2Ag (s), Copper + Silver nitrate ->  Copper (ii) nitrate + Silver. NCERT Exemplar Class 10 Science Chapter 1 Chemical Reactions And Equations are part of NCERT Exemplar Class 10 Science.

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