A white precipitate forms, and the solution is found to contain potassium chloride. In the sieve of silver, the recovery of nitrate solution involved displacement by copper metal. Oil and fat containing food items are flushed with nitrogen. 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. Ans. (c)Barium chloride reacts with aluminium sulphate to give aluminium chloride and precipitate of barium sulphate. Reduction :  Reduction is defined as a process which involves gain of hydrogen or loss of oxygen. Thus, respiration is an exothermic reaction. So we mix stoichiometric barium chloride and potassium sulfate: #BaCl_2(aq) + K_2SO_4(aq) rarr BaSO_4(s)darr + 2KCl(aq)#. Ans. answer choices: 1. Chemical equation for Single displacement. What is a difference between a balanced and unbalanced chemical equation ? Q9. … By exploiting the relative insolubility of barium sulfate. Water contains two parts of hydrogen and one part oxygen. #BaSO_4# is relatively insoluble in water; #K_(sp)=1.08xx10^(-10)#. Q3. when magnesium ribbon remains exposed to moist air, A white layer of magnesium oxide is formed On its surface. A process in which the original substance lose their nature and identify to form a new chemical substances with different properties is called a chemical reaction. Hence, Na has been oxidized to Na2. This solvent would precipitate out the #KCl#. Ans. This is because according to the law of conservation of mass , mass can neither be created nor destroyed. barium chloride are mixed to form potassium. 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). Here, Zn Displaces Cu from its Solutions (CuSO4). What does one mean exothermic and endothermic reactions? Lv 4. Why should the equation be balanced ? (ii).Write the reaction of the substance ‘X’ named in (i) above with water. Write the reaction and identify the precipitate. Ans. Sodium (Na) has gained oxygen to form Na2O. In the above reactions, Na and H2 gains oxygen to form Na2O and H2O respectively. The formula unit for the formation of potassium chloride and barium sulfate is one mole. Explain the following terms with one example of each: Ans. (b) Write an equation for the reaction that occurred. Give examples. Ans. Q14. Q6. A shiny brown coloured element X on heating in air becomes black in colour. How do you find the concentration of a solution in ppm? Write down the reaction involved. Sol. Well you could suck it dry, but this would take forever. 1827 views Ans. (i) The phenomenon due to which metals are slowly eaten away by the reaction of air, water and chemicals present in the atmosphere is called corrosion. We would expect them to undergo a double displacement reaction with each other. Endothermic reactions: Those reactions In which heat is absorbed during the reaction are called endothermic reactions. Element X is copper and the black coloured compound is copper (II) oxide. AgNO3(aq) + NaCl(aq) -> AgCl(s) (White ppt) + NaNO3(aq). Give example of a double displacement Reaction other than the one in Activity 1.10. Hence, H2 has been oxidised to form  H2O. Thus, these reactions are supposed to be opposite of each other. Ans. If barium sulphate is precipitated in the presence of potassium permanganate (KMnO4), it turns to a pink (violet) colour after absorbing some of the permanganate. An equation in which the number of atoms of different elements on the two sides of the equation are equal is called a balanced equation. A solution of barium chloride is mixed with a solution of potassium sulfate and a precipitate forms. Write the net ionic equation for this reaction. As an inexpensive, soluble salt of barium, Barium Chloride finds wide application in the laboratory. 2KBr (aq) + BaI2 (aq) –> 2KI (aq) + BaBr2 (aq). The supernatant solution should be #KCl(aq)#. Find another reaction. Why is the amount of gas collected in one of the test tubes double of the amount collected in the other on electrolysis of water ? (d) Magnesium +Hydrochloric acid (aq) -> Magnesium chloride (qa) + Hydrogen (g). What do you mean by balanced equation ? Now this is filtered (or decanted) off to give a solution that should be reasonably pure #KCl(aq)#. Explain giving examples. 3BaCl2 + Al(SO4)3 –> 3BaSO4 + 2AlCl3. The representation of a chemical reaction by using the symbols and formulae of the reactants and the products is called a chemical equation. Chemical Reaction and Equation class 10 Notes, NCERT Solutions for class 10 Science - Product of Class of Achievers, NCERT Solutions for Class 10 Hindi Sparsh Manushyata, NCERT Solutions for Class 10 Hindi Sparsh Parvat Pradesh me Pavas, Aatmkathya Jaishankar Prasad Kshitij NCERT Solutions for Class 10, Savaiya Aur Kavitt Dev Kshitij NCERT Solutions for Class 10, Tulsidas Ram Lakshman Parshuram Samvad Kshitij NCERT Solutions for Class 10, संसाधन एवं विकास / sansadhan evam vikas class-10 notes in hindi. A solution of a substance X Is used for white washing. (ii)Decomposition reaction involving description of heat list. Tick the correct answer. Ans. Exothermic reactions: Those reaction in which heat is evolved during the reaction are called exothermic reaction. Ans. (c)   Aluminium + Copper Chloride -> Aluminium chloride + Copper. (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. (i).Name the substance ‘X’ and write its formula. The food taken by the living beings is ultimately ultimately broken down to glucose by the digestive system. Name the element X and the black coloured compound formed. (a) Hydrogen gas combines with nitrogen to form ammonia. Ans. Why does the colour of copper sulphate change when an iron nail is dipped in it? Q2. It is commonly used as a test for sulfate ion. Ans. Why do gold and silver not corrode in moist air ? Because it is insoluble in water we know that it is the precipitate. Explain with suitable examples. Q1. When barium chloride reacts with potassium sulfate, barium sulfate and potassium chloride arc produced. Write one equation each for decomposition reactions where energy is supplied in the form of heat, light and electricity. Coke + Steam -> Carbon monoxide. e.g. Why does zinc react with dilute sulphuric to give hydrogen gas but copper does not ? Ans. What is a balanced chemical equation? Ans.3BaCl 2 (aq) + Al 2 (SO 4 ) 3 (aq) -> 2AICI 3 (aq) + 3BaSO 4 (s) (d)Potassium metal reacts with water to give potassium hydrogen oxide and hydrogen gas. Q11. Obviously therefore O2 has been reduced. Potassium is the most reactive metal and platinum is the least reactive metal. Why? (ii).Barium chloride + Aluminium Sulphate –> Barium Sulphate + Aluminium Chloride. Ans.3BaCl2 (aq) + Al2(SO4)3(aq) -> 2AICI3 (aq) + 3BaSO4(s). The glucose so formed is slowly oxidised to carbon dioxide and water with the release of heat energy. Q3. Oil and fat present in the food items get oxidised and become rancid in the presence of air or oxygen. Ans. (c) Hydrogen(g) + Chlorine (g) -> Hydrogen chloride (g). Potassium Permanganate Test for Barium Sulphate. Q9. Cu (S) + 2AgNO3(aq) -> Cu (NO3)2(aq) + 2Ag (s), Copper + Silver nitrate ->  Copper (ii) nitrate + Silver. 1 mole of barium chloride and 1 mole of potassium sulfate. What is the percent concentration of a 6m solution of NaCl? (b) Chlorine gas and iron hydroxide are produced. Thus, Copper Sulphate reacts to form iron (ii) Sulphate, the blue colour of copper sulphate Solution fades. Ans. Ans. BaCl2(aq) + Na2SO4(aq) -> BaSO4 (s)+2NaCl (aq). Barium chloride + potassium sulphate barium sulphate + potassium chloride 2 See answers pranjal4675 pranjal4675 Answer: barium sulphate is the precipetate formed it is yellow in colour. Copper oxide (CuO) has Lost oxygen to form Cu. Paint does not allow oxygen (from air) and water (moisture) to come in contact with the surface of iron. Write equation for these reactions. What do you mean by ‘ activity series of metals ‘ and also name the most reactive metal and least reactive metal of the activity series of metals. Hydrogen gas and iron chloride are produced. Ans.3BaCl 2 (aq) + Al 2 (SO 4 ) 3 (aq) -> 2AICI 3 (aq) + 3BaSO 4 (s) (d)Potassium metal reacts with water to give potassium hydrogen oxide and hydrogen gas. (iii)Decomposition reaction involving absorption of electrical energy. Ans. Ans.The substance ‘X’ used to white washing is Quicklime (Calcium oxide). Why do we apply paint on iron articles? Thus , they have very low reactivity and hence do not corrode in moist air. What is the percent concentration of sodium chloride in normal saline? Ans. (i) Solution of barium chloride and Sodium sulphate in water react to give insoluble barium sulphate and the solution of sodium chloride. If you continue to use this site we will assume that you are happy with it. Write the balanced chemical equation to the following and identity the type of reaction in each case. Q8. This is because zinc is more reactive than hydrogen whereas copper is less reactive than hydrogen in the activity series. Q6. Oxidation : Oxidation is defined as a process which involves gain of oxygen or loss of hydrogen. Ans. H2 has gained oxygen to form H2O. (d) Potassium metal reacts with water to give potassium hydroxide and hydrogen gas.

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