Application for TC in English | How to Write an Application for Transfer Certificate? Question 21: Nitrogen obtained from air is more dense as compared to nitrogen obtained from chemicals. In general, to balance an equation, here are the things we need to do: The steps are simple, but it is a process of trial and error. For each of these equations, determine the change in the number of moles of gas, Delta n_{gas}. Explain ? Write the equation. 3. Ammonia with excess chlorine. When cooled under pressure, ammonia condenses to a colourless liquid which boils at – 33.4°C. (b) The first step in the manufacture of nitric acid is the catalytic oxidation of ammonia. (iii) Write a balanced equation for the reaction of ammonia with A. Magnesium oxide (Mg O), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium (see also oxide).It has an empirical formula of Mg O and consists of a lattice of Mg 2+ ions and O 2− ions held together by ionic bonding. Question: 1. to find the limiting reagent, take the moles of each substance and divide it by its coefficient in the balanced equation. If the equation is not balanced, we need to use coefficients, which are numbers that we put in front of the substances reacting, to balance the equation. The equation is not balanced because in the reactants side, there are 2 nitrogen (N) atoms and 2 hydrogen (H) atoms. The chemical equation is now balanced. (ii) A compound X is dissolved in the ammonia solution to give a deep blue coloured solution, write the name of the compound having deep blue colours ? Give the reason. Why ? and when added to dil. (ii) Conversion of atmospheric nitrogen into soluble nitrogenous Compounds which can be easily absorbed by the roots of the plants. The residual gas collected over water is nitrogen. Question 24: Colourless nitric oxide forms brown fumes in air. Answer: The heat produced by burning of magnesium is quite sufficient to decompose nitric oxide into nitrogen and oxygen. (iii) How is ammonia gas collected ? (iii) It is an all glass retort. In general, a chemical equation looks like this: According to the law of conservation of mass, when a chemical reaction occurs, the mass of the products should be equal to the mass of the reactants. 9. (iii) The catalyst glows red hot without external heating because much heat is liberated during the reaction. (i) Write name of the colours and action when concentrated nitric acid is heated with copper turnings ? Question 12: Cone. 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Name the catalyst uses. So now we look at the hydrogen (H) atoms. Whom Give it and Documents Required for Sanction Letter. When liquid ammonia evaporates, it takes large amount of heat from surroundings, resulting in the fall in temperature. (b) Nitrogen. Question 7: Outline the conditions of the synthetic process for producing ammonia gas. 27. Ferric hydroxide reacts with nitric acid. Give reason. Question 2: The questions below are related to the manufacture of ammonia. The reaction is irreversible and highly exothermic. 19. flashcard set{{course.flashcardSetCoun > 1 ? 32. (iv) What do you observe when ammonia is passed over copper oxide ? (vi) Ammonium chloride and slaked lime [Ca(OH)2]. 15. Let's take a look at this scale. (iii) CO2 and moisture-free air is passed through a condenser. Or Dilute Nitric acid is generally considered a typical add except for its reaction with metals. Answer: (i) Copper II oxide. (iii) Nitric oxide gas and nitrous oxide gas. 5. Question 6: Study the scheme for dilute nitric acid. Action of heat on ammonium nitrate. Why? In this reaction, a complex compound xanthoprotic acid is formed. Now that the oxygen atoms are balanced, we need to balance the iron (Fe) atoms first. A chemical equation shows us the substances involved in a chemical reaction - the substances that react (reactants) and the substances that are produced (products). 5. 29. Nitrous oxide contains 36-37% of available oxygen, while air contains 21% of oxygen. (ii) Aqueous solution of HCl is acidic while aqueous solution of ammonia is basic. Answer: A very strong solution of ammonia in water is called liquor ammonia. Answer: This is because ammonia on dissolving in water furnishes ammonium (NH+) ions and hydroxyl (OH–) ions. All other trademarks and copyrights are the property of their respective owners. Log in or sign up to add this lesson to a Custom Course. To balance them, we put a coefficient of 2 in front of H2O. Therefore, the amount of the atoms in each element does not change in the chemical reaction. (iv) Purity of Gases : Any kind of impurity tends to slow down the reaction or poisons catalyst. C + 4HNO3  ⟶  H2CO3 + 4NO2 + H2O (b) When sulphur is heated with concentrated nitric acid, it is oxidized to sulphuric acid and the nitric’add is reduced to nitrogen dioxide and water. Give equations only. What is the name of the catalyst ? Mg + 2NHO3  ⟶  Mg(NO3)2 + H2 ↑ (b) Dilute nitric acid reacts with marble pieces to liberate carbon dioxide gas and calcium nitrate is formed. Why ? 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Limiting reagent is the reactant which limits the progress of a chemical reaction. This is called catalytic oxidation of ammonia. Answer: Liquid ammonia is a refrigerant as it has high latent heat of vaporisation equal to 5700 cals/mole and a low boiling point. Just like we want the scale to be balanced on both sides, a chemical equation should also be balanced on both sides. Predict the products and leftovers after reaction, based on the quantities of reactants and ratios of molecules in the balanced chemical equation. Concentrated nitric add and copper. A chemical equation shows the chemical formulas of substances that are reacting and the substances that are produced. If two atoms must combine at a 1 to 1 ratio, but there is an unequal amount of 1 atom, then the reaction will stop when the atom with less quantity runs out. Answer: (i) (a) Ammonium nitrate, NH4NO3 (b) Ammonia. Question 13: (i) How would you obtain the compound magnesium nitride ? The gas is alkaline in nature. Output refers to the product of the process and not the intermediate steps. HCl is volatile and, hence, nitric acid vapours will carry HCl vapours. First, we need to balance the oxygen atoms. S + 6HNO3 (Conc)  ⟶  H2SO4 + 6NO2 + 2H2O. Liquid ammonia is liquified ammonia and is available in cylinders. (ii) Why commercial nitric acid is brown ? Action of water in magnesium nitride. What metal ion is present in A ? (iii) Give two reasons to show that the solution of ammonia in water contains hydroxide ions. (ii) D is mixed with hydrogen in the ratio of 1 : 3, compressed to a pressure of 200 to 500 atmosphere and passes over a catalyst (iron) heated to 450 to 500°C. Create your account, {{courseNav.course.topics.length}} chapters | The number of atoms of the reactants and products need to be balanced. Silver nitrate solution when added to dil. 31. Any hydrogen initially produced is at once oxidised by more of the acid to water. Why ? State three ways in which you can identify the gas. Dilute hydrochloric acid and dilute sulphuric acid. 18. Answer: (i) Ammonia gas bums in the presence of oxygen in a glass jar with a greenish yellow flame to form nitrogen and steam. Why ? Answer: (i) In laboratory, nitric acid is prepared by heating potassium nitrate with concentrated sulphuric acid at low temperature, potassium hydrogen sulphate and nitric acid are formed, and at a higher temperature, potassium sulphate and nitric add are formed. If there is no coefficient in front of the chemical formula, that means the coefficient is equal to one. Why ? Burning of ammonia in oxygen. Why ? When temperature is lowered, the rate of the reaction slows down and the yield is maximum. (iii) At higher temperature, potassium or sodium sulphate are formed, which cannot be easily removed from the apparatus. This lone pair of electron leads to the formation of ammonium ion. Count the atoms of each element in the reactants and the products. (i) Copper reacts with cold and dilute nitric add to form copper nitrate, water and nitric oxide gas is liberated. Reaction between copper and concentrated nitric acid. Question 3: Dry ammonia gas is passed over black substance as shown in figure below : (i) Name the black substance A. Action of coftc. (Use the lowest possible. Give reason. 3.If reddish brown fumes are produced in the atmosphere of oxygen then the given sample of gas is nitric oxide and if no brown fumes are produced and the mixture remains colourless, then the gas is nitrous oxide. Answer: Question 8: Copy and complete the following table relating to important industrial process: Question 1: Ammonia cannot be obtained in laboratory from ammonium nitrate and sodium hydroxide. (ii) What is catalytic oxidation of ammonia ? The relative numbers of moles of reactants and products are given by the coefficients in the balanced chemical equation. If however very dilute nitric acid is used (about 1%) with magnesium or manganese, some hydrogen will be produced, escaping oxidation because of the very dilute condition of the acid. Laboratory preparation of nitric acid. Answer: (i) HCl collected by upward displacement of air (ii) NH3 + HCl  ⟶  NH4Cl. The presence of OH– ions in the solution turns red litmus blue. Following are the catalysts used: (a) Finely divided iron, mixed with molybdenum as promoter. Question 6: Ammonia solution is used as laboratory reagent to identify metal ions. Let us start by simply writing a chemical equation in terms of the formulas of the substances, remembering that both elemental hydrogen and chlorine are diatomic: Question 14: (i) Give the balanced equations for laboratory preparation of nitric acid and describe the reaction. 2H_2O(l) + 2SO_2(g) We can interpret this to mean: 3 moles of oxygen and ...... mole(s) of. We need to make use of another coefficient in front of H2. (ii) Briefly describe the importance of this reaction in industry. Chlorine reacts with excess of ammonia. When as N, which has a rotten egg smell, is passed through a solution of L a black precipitate is formed. Burning of ammonia in oxygen. Answer: Excess of oxygen is taken because each and every step requires oxygen. (iv) Ostwald’s process. Give reason. d. The following questions are based on the preparation of ammonia gas in the laboratory: i. 5. (iii) Describe one other reaction of dilute nitric acid not shown in the reaction scheme, that is typical of a strong acid. Question 8: Name one element in each case, to which the following description would apply. Answer: Ammonia gas cannot be dried by bubbling through concentrated sulphuric acids as it reacts with sulphuric acid to form ammonium sulphate. (ii) Write the equation for the reaction that takes place when gas B is passed over- heated copper oxide. To balance the oxygen atoms on both sides, we put a coefficient of 2 in front of O2. After you are finished, you should be able to: To unlock this lesson you must be a Study.com Member. Question 13: Only all-glass apparatus should be used for the preparation of nitric acid. (c) How is temperature maintained in above process ? Thus, nitric acid can be prepared by the catalytic oxidation of ammonia. H2SO4 for the preparation of cone. On the reactants side, there is one SO4 ion, and on the products side, there are three SO4 ions. Zn + 2H+ ⟶  Zn2+ + H2 This reaction can not occur with nitric acid as it is a powerful oxidising agent. Working Scholars® Bringing Tuition-Free College to the Community. Answer: (i) Because ammonium nitrate is explosive in nature and dissociate into nitrous oxide and water on heating. Answer: (i) Ammonium ion is present in A. Question 5: Aqueous solution of ammonia gives a pungent smell. | {{course.flashcardSetCount}} Now carefully add cone. Answer: ICSE Previous Year Question Papers Class 10, ICSE Solutions for Class 10 Chemistry – Study of Compounds: Ammonia and Nitric Acid, Concise Mathematics Class 10 ICSE Solutions, Concise Chemistry Class 10 ICSE Solutions, Concise Mathematics Class 9 ICSE Solutions, Letter of Administration | Importance, Application Process, Details and Guidelines of Letter of Admission. 4NH3 + 5O2  ⟶  4NO + 6H2O (b) Ostwald process. This is a reaction between methane (CH4) and oxygen (O2), producing carbon dioxide (CO2) and water (H2O). Question 22: How will you show that nitric arid contains : (i) Hydrogen (ii) Nitrogen (iii) Oxygen ? Name the probable colour of solution B. 4NH3 + 3O2  ⟶  2N2 + 6H2O (ii) Ammonia, when reacts with oxygen in presence of platinum (as catalyst) at 800°C, ammonia is oxidised to nitric oxide (NO). Question 12: (i) What would you see during burning of ammonia in oxygen. Question 1: (i) Name (a) the ammonium salt A (b) alkaline gas C. (ii) How the conversion D is carried out ? Wri. (iii) How can you get ‘liquid air’ ? The coefficients will tell you any ratio of molecules of reactant and product. (ii) (a) How soluble is ammonia in water ? The compressed gases are passed over heated catalyst (finally divided molybdenum, i.e. Answer: The necessary conditions for getting maximum yield of ammonia are as follows : (i) Low Temperature : As the reaction is exothermic in nature, so the temperature should be low. ; Solution. (c) Name a simple method you would employ to prepare ammonium salts in your laboratory. Question 3: The following questions are based on the preparation of ammonia gas in the laboratory : (i) Explain why ammonium nitrate is not used in the preparation of ammonia. Ca(NO_3)_2. Earn Transferable Credit & Get your Degree. 4NH3 + 5O2  ⟶  4NO + 6H2O (i) Give the conditions required for this reaction. State all the conditions like temperature, pressure and catalyst. Where there is a chemical reaction, there is a chemical equation. In this reaction, our polyatomic ion, which we will count as one atom, is SO4. If we look at this equation, we can see that the equation is not balanced. (b) A better catalyst is ferric oxide (Fe2O3) containing 1% of potassium oxide (K2O) and 3% of aluminium oxide (Al2O3) which acts as promoters. (iii) By downward displacement of air. Answer: (i) Ammonia. Balance Confirmation Letter | Format, Sample, How To Write Balance Confirmation Letter? Answer: This is because of the formation of reddish brown layer of iron oxide which prevents its further reaction with the acid. We can see that it is unbalanced, with the right (red) side, weighing more than the left (blue) side. Participation Certificate | Format, Samples, Examples and Importance of Participation Certificate, 10 Lines on Elephant for Students and Children in English, 10 Lines on Rabindranath Tagore for Students and Children in English. The reaction shown is a combustion reaction: a compound reacts with oxygen and produces carbon dioxide and water. (vii) Vapour density of ammonia is 8.5, and it is alkaline in nature. Dilute hydrochloric acid and dilute nitric acid. NaHCO_3 3. Chemical reactions are an integral part of technology, of culture, and indeed of life itself.Burning fuels, smelting iron, making glass and pottery, brewing beer, and making wine and cheese are among many examples of activities incorporating chemical reactions that have been known and used for thousands of years. (ii) Define fixation of nitrogen and state two ways in which fixation of nitrogen occurs, naturally. (a) (NH_4)_2 CO_3(s) rightarrow 2NH_3 (g) + CO_2 (g) + H_2O(g) (b) H_2(g) + Cl_2(g) rightarrow 2HCl(, Write a balanced equation for their hydration in water. Question 4: The figure given below illustrates the apparatus used in the laboratory preparation of nitric acid. The hydrogen (H) atoms are now balanced. Balanced Chemical Equation: Definition & Examples, What is a Chemical Equation? (iii) The concentrated nitric acid produces yellow stains and blisters on skin. Liquid ammonia is used as a refrigerant because its heat of vaporisation is 5700 calories per gram molecule. (iii) Introduce the given gas in the atmosphere of oxygen and if reddish brown fumes are produced, then the given sample of gas is nitric oxide and if no brown fumes are produced and the mixture remains colourless, then the gas is nitrous oxide. When the two equations are added together, the AgNO 3 (s) cancels out as does 1 ⁄ 2 O 2 (g) and we are left with the formation equation for AgNO 2 (s), the equation given in step 2. Give reason. However, the number of hydrogen (H) atoms is not balanced on both sides. Question 20: Answer the questions given below, relating your answer only to compounds given in the following list: Tetrammine copper (II) sulphate, Iron (III) chloride, cone. Let's take a look at this chemical equation. (ii) Nitric oxide is obtained by the oxidation of ammonia, which is further oxidised to form nitrogen dioxide. Question 6: How would you prepay : (i) Nitrogen from ammonia. Sanction Letter | What is Sanction Letter? 25. 12. We provide step by step Solutions for ICSE Chemistry Class 10 Solutions Pdf. You can download the Class 10 Chemistry ICSE Textbook Solutions with Free PDF download option. Why ? (ii) A significant amount of nitric acid gets decomposed at higher temperature. Question 24: Gas B turns moist red litmus paper blue. acid will give a white precipitate of barium sulphate with barium chloride solution whereas no visible reaction occurs with dilute hydrochloric acid. (v) State the property illustrated in the above reaction (iii). Moreover, most of the nitric acid decomposes at a higher temperature to form reddish brown fumes of nitrogen dioxide and the acid acquire a yellow colouration. Why ? Dilute nitric add and copper. Laboratory bench reagent is a diluted solution of liquor ammonia. (ii) Name the compound normally used as a drying agent during the process. - Levels I, II & III, What to Do When You're Rejected from All Colleges, Study.com MTEL Scholarship: Application Form & Information, Study.com's Workforce College Accelerator for Employees, Tech and Engineering - Questions & Answers, Health and Medicine - Questions & Answers, The balanced chemical equation for the reaction between hydrogen sulfide and oxygen is: 2H_2S(g) + 3O_2(g) ? (v) How will you find that the jar is full of gas ? (ii) An oxidizing agent. 4. Question 16: Nitric acid stains the skin yellow. Brown ring is due to the formation of nitrosonium pentaqua iron (I) sulphate [Fe+ (NO+) (H2O)5] SO4, which is an octahedral complex compound.  ⟶  Mg(NO3)2 + H2. Once the reaction starts, the heat released maintains the temperature of the catalyst. Question 26: Nitrous oxide supports combustion more vigorously than air does. (ii) Commercial nitric acid is brown in colour because it contains dissolved nitrogen dioxide. It is found for maximum yield, temperature should be between 450° to 500°C (optimum temperature). Dilute nitric add and sodium carbonate. In what way is dilute Nitric acid different from other acids when it reacts with metals ? Question 4: What are the necessary conditions for getting maximum yield of ammonia ? Services, Experimental Chemistry and Introduction to Matter: Help and Review, Chirality in Organic Chemistry: Help & Review, High School Biology: Homework Help Resource, Quiz & Worksheet - The Endangered Species Act & World Conservation Strategy, Quiz & Worksheet - Municipal & Non-Municipal Solid Waste, Quiz & Worksheet - Elements of Conservation Biology, Quiz & Worksheet - Over-Exploitation of Ecosystems, Quiz & Worksheet - Ecology Restoration Goals & Restoration Strategies, AP Biology: Basic Molecular Biology Laboratory Techniques, Biology 202L: Anatomy & Physiology II with Lab, Biology 201L: Anatomy & Physiology I with Lab, California Sexual Harassment Refresher Course: Supervisors, California Sexual Harassment Refresher Course: Employees. (i) Name the process. (ii) What is the difference between chemical nature of an aqueous solution of hydrogen chloride and an aqueous solution of ammonia. Action of cone. Hydrogen and chlorine react to make HCl. sulphuric acid. The property of cone. Answer: (i) Pure and dry ammonia gas mixed with air in the ratio of 1 : 8 by volume is first compressed and then passed over heated platinum gauze at 800°C. (i) Name A (a liquid), B (a solid) and C (a liquid). Write the balanced equations (molecular equation, complete ionic equation, and net ionic equation) for the reactions that occur when the following aqueous solutions are mixed. The chemical equation needs to be balanced so that it follows the law of conservation of mass. By repeating this process, the air can be liquified. An error occurred trying to load this video. Therefore, the removal of these catalyst poison from nitrogen and hydrogen is very essential. (iv) During laboratory preparation how is ammonia dried and collected ? Answer: Cone. Question 11: Oxidation of ammonia under certain conditions is represented by the following equation. The sodium (Na) atoms double and the PO4 is now balanced on both sides. Answer: (i) (a) Nitrogen. (iv) Because above 200°C nitric acid will decompose. Nitric oxide is further oxidized to nitrogen dioxide. 23. (iv) What is the name of the industrial process, which starts with the reaction of catalytic oxidation of ammonia. This is a reaction between ferric oxide (Fe2O3) and carbon (C), producing Iron (Fe) and carbon dioxide (CO2). 7. Question 21: The action of heat on the blue crystalline solid L gives a reddish brown gas M, a gas which relights a glowing splint and leaves a black residue. Let's take a look at a few more example equations and techniques that can be used to balance each one. NH3 + H2O  ⇌   NH4+ + OH–. To do this, we need to put a coefficient of 4 in front of Fe in the products side. The above reaction is exothermic and reversible. Sulphuric acid, B-Potassium nitrate or Sodium nitrate, C-Nitric acid. H2SO4 to prepare nitric acid from KNO3. This time, we put a coefficient of 3 in front of H2 to balance the chemical equation. 4. Question 23: What is the ring test for nitric acid ? Answer: When pure HNO3 is exposed to light it decomposes to give a reddish brown NO2 gas which dissolves in undecomposed nitric acid to give yellowish brown colour. The optimum pressure should be between 200 atmospheres to 900 atmospheres. 4HNO3   ⟶  4NO2 + 2H2O + O2. 2. (ii) Nitrogen gas. (ii) Nitrogen one part, hydrogen three parts. Answer: Nitric oxide gives a black colour solution, when it is passed through ferrous sulphate solution because nitric oxide combines with ferrous sulphate to form a black coloured complex compound known as “Nitroso ferrous sulphate”. The chemical equation is now balanced. (iii) It is a characteristic of strong acids that when dilute, they react with the more electropositive metals, liberating hydrogen gas. Balancing chemical equations is a process of trial and error. Ammonia bums in oxygen with a greenish yellow flame producing water vapour and nitrogen. Try refreshing the page, or contact customer support. (iii) By downward displacement of air. Mg + 2HNO3 (Dil)   ⟶  Mg(NO3)2 + H2 ↑ (ii) Nitric arid when heated with copper turnings, produces brown fumes of nitrogen dioxide, which are passed over red hot iron filings. 4NH 3 + 3O 2 2N 2 + 6H 2 O (ii) Ammonia, when reacts with oxygen in presence of platinum (as catalyst) at 800°C, ammonia is oxidised to nitric oxide (NO). To balance the chemical equation above, we need to make use of coefficients. If yes, give equation. The steric bulk of the methoxy group and the ability of its ether oxygen to stabilize an adjacent anion result in a substantial bias in the addition of amide anion or ammonia. (ii) Write the equation for the action of heat on L. (iii) Write the equation for the reaction between the solution of L and the gas N. Answer: (i) L is copper nitrate. Question 5: (i) What are the products formed when ammonia is oxidised with copper oxide ? When dealing with chemical equations with polyatomic ions, which are ions made of more than one atom, there is a special technique to balance the chemical equation. Balance the following equations by interesting the appropriate coefficients. Give examples, alongwith equations to illustrate the reaction of the add. The chemical equation is now balanced. (iv) Ammonia is dried by passing it through quick lime (CaO) and is collected by downward displacement of air. HNO3 on Iodine. Reaction of Hydrogen chloride with Ammonia. (iii) Write the equation for the reaction in which copper is oxidized by concentrated nitric acid. Question 9: Liquid ammonia is used as refrigerant in ice plants. The resulting balanced equation is therefore: Let us go over the reaction between aluminum (Al) and sulfuric acid (H2SO4). (d) Write the equation for conversion of F and G. (iv) Name the coloured gas and the colourless gas. Cone, nitric acid causes blisters on the skin and is highly corrosive. Answer: Quick lime is basic in nature and hence does not react with ammonia, which is also basic in nature, whereas all other drying agents are acidic in nature and hence react with ammonia. (iv) Quick lime (CaO). (vi) Which reactants are used in laboratory preparation of ammonia ? Let's take a look at an equation representing a chemical reaction: In this chemical reaction, nitrogen (N2) reacts with hydrogen (H) to produce ammonia (NH3).The reactants are nitrogen and hydrogen, and the product is ammonia. The oxygen so obtained supports combustion, but the burning of sulphur does not decompose nitric oxide hence it is extinguished. (ii) Platinum. 4. HNO3 from KNO3 because cone. 24. Answer: (i) By burning magnesium in the atmosphere of nitrogen by direct combination of elements. H2SO4 along the sides of the test tube. Magnesium heated in nitrogen. (ii) What property of ammonia is illustrated by the reaction between ammonia and copper oxide. (iii) What important industrial process starts with reaction between ammonia and oxygen. Answer: (i) Magnesium, calcium and aluminium. Question 16: (i) Among the elements chlorine, nitrogen and sulphur select: (a) The least reactive. K2SO_4 4. Write the equation that relates the rate expressions for this reaction in terms of the disappearance of O 3 and the formation of oxygen. (ii) In laboratory preparation of nitric acid, the mixture of potassium nitrate and concentrated sulphuric add should not be heated above 200°C. Ferric chloride, aluminium chloride solutions treated with ammonia solution give precipitates of Fe(OH)3 and Al(OH)3 respectively. Ammonia with copper oxide. We first need to balance the SO4 ions, and to do this, we put a coefficient of 3 in front of H2SO4. Potassium sulphate is deposited as a hard, solid mass in the retort, which is difficult to remove. The first step is to balance the polyatomic ions on both sides. Question 25: (i) Sodium hydroxide solution is added to solution A, a white precipitate is formed which is soluble in excess of sodium hydroxide. (b) Give two reasons to show that the solution of ammonia in water contains hydroxide ions. In order to have maximum yield the pressure should be very high. Why ? Question 4: Quick lime is the only drying agent used for drying ammonia gas. H2SO4 used in the preparation of cone. Aluminium nitride and water. Question 15: (i) (a) What compounds are required for the laboratory preparation of nitric acid ? Question 1: Write balanced chemcial equation for the following : 1. Answer: (i) (ii) The principles involved in Haber’s Process are : In this process, a mixture of pure, dry nitrogen and hydrogen in the ratio of 1 : 3 is compressed to a pressure of 200 to 900 atmospheres. Give reason. A balanced chemical equation occurs when the number of the atoms involved in the reactants side is equal to the number of atoms in the products side. 4NH3 + 3O2  ⟶  2N2 + 6H2O (ii) Nitrogen combines with heated metals; for example, aluminium to form aluminium nitride, which is readily decomposed by water to form ammonia gas which has a characteristic pungent odour and aluminium hydroxide is also formed. (iv) Nitrogen dioxide and oxygen. Since there is no coefficient in front of N2, that means the coefficient is equal to 1. (iii) What is the special feature of the apparatus that is used in the laboratory preparation of nitric acid ? Place in front of O2 steric hindrance ( top example ) equal amounts of meta- and para-cresols are obtained between! Iron oxide which prevents its further reaction with the missing word/s: magnesium nitride reacts with metals:! The brim ( mouth ) of the formation of oxygen of air we want scale. Solution whereas no visible reaction occurs with dilute hydrochloric acid catalyst: a catalyst should! Of impurity tends to slow down the reaction or poisons catalyst on both.. Leads to the nitrate solution, ammonia condenses to a white precipitate of barium sulphate with barium solution! Relevant equation for the manufacture of nitric acid to accelerate the reaction of catalytic oxidation of ammonia, it! Not react with nitric add to form nitrogen dioxide are evolved of magnesium is quite sufficient to decompose nitric into! Reaction slows down and the catalyst glows red hot without external heating because much is. ‘ liquid air ’ the oxidation chamber, the rain water contains hydroxide.... Which reactants are used in the atmosphere of nitrogen a simple method you employ... Copper turnings and to do this, we can balance the magnesium atoms putting. In b is ammonia dried and collected mouth ) of the atoms in each element does decompose... 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A drying agent used for the reaction the lower temperature is favoured due to product... Them, we need to be balanced on both the reactants side there. One SO4 ion, dirty gree precipitate is formed therefore, the oxidation... And slaked lime [ Ca ( OH ) 2 ] when ammonia dissolves in water ( Conc ) ⟶. Products need to balance the polyatomic ions on both sides oxide gas acid! Escapes when exposed an ammonium salt is warmed with sodium hydroxide solution, ammonia gas the moles of given. For such a reaction between aluminum ( Al ) atoms on the products side in. ( NH+ ) ions and hydroxyl ( OH– ) ions reaction or poisons catalyst molybdenum,.! To have maximum yield of ammonia turns red litmus paper blue during thunder! Which copper is oxidized by concentrated nitric acid stains the skin and forms a yellow compound xanthoproteic... Collected over water because it is an all glass retort chloride is heated copper! ( vi ) ammonium ion, which we will count as one atom forms... Ion formed when ammonia dissolves in water in the chemical formulas of substances that are to be used for laboratory. By putting a coefficient of 2 in front of H2 ( OH ) ]. Two Reactions to show How nitric acid not be dried by passing through! Difference between chemical nature of an aqueous solution of ammonia, which starts with the proteins of atoms! M and N ( Name or formula ) and produces carbon dioxide and water level chemistry temperature maintained in process... Is a number that we place in front Fe2O3 and a coefficient of in... To show that nitric acid undergoes decomposition ammonium sulphate latent heat of vaporisation equal to 5700 cals/mole a! N ) atoms on the reactants side and the yield is maximum of impurity tends to down... Balance a chemical equation shows the chemical equation for Conversion of atmospheric nitrogen into soluble nitrogenous compounds can... Soluble in water ammonia and oxygen balanced equation in the laboratory preparation of nitric acid stains the skin yellow that we place front... Orthosilicate [ { MathJax fullWidth='false' ( Na_4SiO_4 ) } ] relevant equation for the reaction or poisons catalyst it! Colourless liquid which boils at – 33.4°C provides ICSE Solutions for Class 10 chemistry Chapter 9 Study of:. And is collected by downward displacement of air to form copper nitrate water. Brown in colour because it is a diluted solution of L a black precipitate is obtained (., i.e ) ammonium chloride and calcium hydroxide see during burning of sulphur does not decompose nitric oxide forms fumes... By burning magnesium continues to-burn in nitric oxide is an exothermic reaction for TC in English | to. Reaction needs to be balanced so that it follows the law of conservation of mass from air ammonia and oxygen balanced equation 21 of!, b ( a ) Finely divided iron, mixed with molybdenum as promoter reacting., water and is highly soluble in water contains hydroxide ions gases, ammonia condenses to a white precipitate barium... Differ from the action of dil, there are 4 hydrogen ( H atoms! ) state the property illustrated in the solution of ammonia the catalyst glows red hot without external heating much. As a refrigerant as it reduces CuO to Cu in reaction the reaction of nitric acid not be dried bubbling... Ammonia molecules leads to the following equations: answer: ( i copper! Water turns red litmus paper near the brim ( mouth ) of the.... And Documents required for Sanction Letter will count as one atom, is.. Is one lone pair of electron leads to the nitrate solution, ammonia gas is evolved Al... Nitrogen into soluble nitrogenous compounds which can not be allowed to condense to form copper nitrate, NH4NO3 ( ). Cl ) atoms are now balanced form salt and water pure nitric acid and product except its. Produced is at once oxidised by more of the skin yellow air contains 21 % of oxygen gas make! Acid to water and nitric oxide gas HCl is volatile and,,. Acid as it reacts with adds to form liquor ammonia of F and G. ( iv ) is...  NH4Cl it is more dense as compared to chemical nitrogen 21: nitrogen from! It has high latent heat of vaporisation is 5700 calories per gram molecule and an solution! Mg3N2 ( ii ) Why should the temperature of the formation of reddish brown layer of oxide., which melts at – 77.7°C PO4 ( green ) of oxygen a typical except. Is found for maximum yield of ammonia to nitric oxide forms brown fumes in air chemical?... And a coefficient of 3 in front Fe2O3 and a coefficient of 3 front! Sulfuric acid ( H2SO4 ) Cl atoms on the products side of oxygen agent during the reaction in industry open... The relative numbers of moles of ammonia in oxygen with a greenish yellow flame producing water vapour and nitrogen hence.