Warning Letter | How To Write a Warning Letter?, Template, Samples. Why ? Recall how the law of conservation of mass requires a balanced chemical equation, State the steps to balance a chemical equation. Action of concentrated nitric acid an copper. Question 7: Aqueous solution of ammonia turns red litmus blue. (iii) Name the catalyst used. (ii) Platinum. (iv) Purity of Gases : Any kind of impurity tends to slow down the reaction or poisons catalyst. (ii) Commercial nitric acid is brown in colour because it contains dissolved nitrogen dioxide. 12. We will treat this whole polyatomic ion as one atom. Question 25: (i) Sodium hydroxide solution is added to solution A, a white precipitate is formed which is soluble in excess of sodium hydroxide. Rewrite the correct statement with the missing word/s: Magnesium nitride reacts with water to liberate ammonia. (ii) Name the catalyst used in the catalytic oxidation of ammonia. Catalytic oxidationof ammmonia. Question 21: Nitrogen obtained from air is more dense as compared to nitrogen obtained from chemicals. (v) How is the temperature maintained in the Ostwald’s process ? Action of coftc. Any hydrogen initially produced is at once oxidised by more of the acid to water. Balancing chemical equations is a process of trial and error. (iii) What important industrial process starts with reaction between ammonia and oxygen. The hydrogen chloride formed removes the oxides of metals and thus cleans the metal surfaces before soldering, tinning, etc. Question 14: (i) Give the balanced equations for laboratory preparation of nitric acid and describe the reaction. 18. (ii) What property of ammonia is illustrated by the reaction between ammonia and copper oxide. To balance the chemical equation above, we need to make use of coefficients. (ii) (a) Extremely soluble. Ammonia bums in oxygen with a greenish yellow flame producing water vapour and nitrogen. Question: 1. APlusTopper.com provides ICSE Solutions for Class 10 Chemistry Chapter 9 Study of Compounds: Ammonia and Nitric Acid for ICSE Board Examinations. (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. HNO3 on Sulphur. Answer: (i) (a) Copper (II) nitrate Cu(NO3)2 (b) Ammonium nitrate (c) Fe3+ (d) Iodine (ii) Oxidising property of nitric acid. Write the equation. Question 6: How would you prepay : (i) Nitrogen from ammonia. Wri. (ii) Discuss the principles involved in Haber’s process. (ii) The cation present in B is copper. So, the gases that are to be used should be pure and dry. 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. Answer: (i) (a) Dilute nitric acid reacts with magnesium metal to liberate hydrogen gas and magnesium nitrate is formed. 1. 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). 4HNO3   ⟶  4NO2 + 2H2O + O2. 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. State three ways in which you can identify the gas. (c) It turns phenolphthalein solution pink. Answer: (i) Haber’s process. Why ? Log in or sign up to add this lesson to a Custom Course. (ii) Name the compound normally used as a drying agent during the process. flashcard set{{course.flashcardSetCoun > 1 ? 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. (i) Name A (a liquid), B (a solid) and C (a liquid). (ii) In laboratory preparation of nitric acid, the mixture of potassium nitrate and concentrated sulphuric acid should not be heated above 200°C because at a higher temperature, potassium sulphate is formed. The sodium (Na) atoms double and the PO4 is now balanced on both sides. (iv) Nitrogen dioxide and oxygen. Download Formulae Handbook For ICSE Class 9 and 10. Fe/Mo) at 450° to 500°C. (iv) Quick lime (CaO). By repeating this process, the air can be liquified. Answer: (i) The bunting of ammonia in oxygen produces a bluish green flame. Answer: This is because of the formation of reddish brown layer of iron oxide which prevents its further reaction with the acid. Nitric oxide gas and nitrous oxide gas. For each of these equations, determine the change in the number of moles of gas, Delta n_{gas}. Hydroxide ion (OH–). Predict the products and leftovers after reaction, based on the quantities of reactants and ratios of molecules in the balanced chemical equation. 7. Answer: (i) (a) Nitre (Potassium Nitrate) and cone, sulphuric acid. Answer: Ammonia gas Is not collected over water because it is highly soluble in water. (b) A better catalyst is ferric oxide (Fe2O3) containing 1% of potassium oxide (K2O) and 3% of aluminium oxide (Al2O3) which acts as promoters. In the absence of steric hindrance (top example) equal amounts of meta- and para-cresols are obtained. (ii) Name the gas evolved B. Answer: (i) (a) Ammonium nitrate, NH4NO3 (b) Ammonia. Volunteer Certificate | Format, Samples, Template and How To Get a Volunteer Certificate? Give reason. This reaction is not balanced. 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. (ii) Why commercial nitric acid is brown ? (i) Write name of the colours and action when concentrated nitric acid is heated with copper turnings ? To do this, we need to put a coefficient of 2 in front Fe2O3 and a coefficient of 3 in front of CO2. Where there is a chemical reaction, there is a chemical equation. (iii) High Pressure : When 4 volumes of a mixture of nitrogen and hydrogen are reduced to 2 volumes of ammonia, the pressure drops. This is a reaction between ferric oxide (Fe2O3) and carbon (C), producing Iron (Fe) and carbon dioxide (CO2). Give equations only. HNO3 on Phosphorus. (iv) During laboratory preparation how is ammonia dried and collected ? 9. Question 10: During the manufacture of nitric acid by Ostwald’s process excess of oxygen is taken. (i) Name the process. (ii) Quick lime. Question 2: Why ammonia gas is not collected over water ? Although the equation for the reaction between molecular nitrogen and molecular hydrogen to produce ammonia is, indeed, balanced, 3 N 2 + 9 H 2 6 NH 3 3 N 2 + 9 H 2 6 NH 3 the coefficients are not the smallest possible integers representing the relative numbers of reactant and product molecules. N is hydrogen sulphide gas. The number of atoms of the reactants and products need to be balanced. State all the conditions like temperature, pressure and catalyst. The sodium metal produced in the reaction is highly reactive and potentially explosive, so it is removed in a reaction with excess KNO_3(s) that produces K_2O(s) and Na_2O(s) and additional nitrogen. (iv) Because above 200°C nitric acid will decompose. Question 24: Gas B turns moist red litmus paper blue. Mention the catalyst used. (Use the lowest possible. 22. (b) It turns moist red litmus paper blue. A chemical equation shows the chemical formulas of substances that are reacting and the substances that are produced. Name the method of collection of this gas. (v) In the Ostwald’s process, the catalytic oxidation of ammonia to nitric oxide is an exothermic reaction. The equation above is now balanced. Answer: Aqueous solution of ammonia gives a pungent smell because it is produced due to bacterial decomposition of urea (NH2CONH2), present in urine. In what way is dilute Nitric acid different from other acids when it reacts with metals ? The first step is to balance the polyatomic ions on both sides. (iii) Nitric oxide gas and nitrous oxide gas. Answer: Liquid ammonia is a refrigerant as it has high latent heat of vaporisation equal to 5700 cals/mole and a low boiling point. So now we look at the hydrogen (H) atoms. Why ? 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. Nitrous oxide contains 36-37% of available oxygen, while air contains 21% of oxygen. (ii) Nitrogen gas. 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. Ammonia can be obtained from it by boiling. (iii) This is due to the chemical reaction that occurs between nitric acid and proteins of skin and flesh. Question 22: How will you show that nitric arid contains : (i) Hydrogen (ii) Nitrogen (iii) Oxygen ? Question 14: Pure nitric acid take on a yellowish-brown colour when exposed to light. Question 15: Concentrated nitric acid fumes when kept open. HNO3 from KNO3 because cone. | {{course.flashcardSetCount}} 14. All other trademarks and copyrights are the property of their respective owners. Answer: (i) Yes. (c) By titration or neutralisation. Ammonium ion and hydroxide ion. The hydrogen (H) atoms are now balanced. When jar is full of gas litmus will turn blue. The preparation of Ammonia from Ammonium chloride and Calcium hydroxide. We do this by putting a coefficient of 3 in front of C on the reactants side. Why ? Ammonia with copper oxide. (b) What is the name of the process ? Question 23: What is the ring test for nitric acid ? The gas is alkaline in nature. In order for the two sides to be balanced, we need to put a little more mass on the left side until they are the same mass. Give examples, alongwith equations to illustrate the reaction of the add. (i) The burning metal which combines directly with nitrogen. 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. (ii) What is catalytic oxidation of ammonia ? (iii) Write a balanced equation for the reaction of ammonia with A. Include the state symbols. (iii) Ostwald process for the manufacture of nitric acid and the catalyst used is platinum gauze. Question 10: (i) Does ammonia bum in oxygen ? and when added to dil. For combustion reactions, the technique is to balance the carbon (C) atoms, followed by the hydrogen (H) atoms and then the oxygen (O) atoms. Ammonia with lead oxide. Answer: (i) By burning magnesium in the atmosphere of nitrogen by direct combination of elements. (i) Name the gas collected in the jar. 30. 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. Action of cone. Answer: Excess of oxygen is taken because each and every step requires oxygen. (i) Copper reacts with cold and dilute nitric add to form copper nitrate, water and nitric oxide gas is liberated. (b) It reacts with adds to form salt and water. Complete and balance the molecular equation, including phases, for the reaction of aqueous sodium sulfate, Na_2SO_4, and aqueous barium nitrate, Ba (NO_3)_2. 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. Try refreshing the page, or contact customer support. 3Mg + N2  ⟶  Mg3N2 (ii) Reducing property of Ammonia, as it reduces CuO to Cu in reaction. Laboratory preparation of nitric acid. (iv) Name the drying agent used. 6. First, we need to balance the oxygen atoms. Solution B is blue in colour. 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. Question 18: In Haber’s process before the gases are allowed to enter the oxidation chamber, the gases are sufficiently cooled. Explain ? Question 12: Cone. 31. Action of heat on silver nitrate. M is nitrogen dioxide gas. Answer: Cone. 27. (iii) The concentrated nitric acid produces yellow stains and blisters on skin. The number of the atoms is not balanced on both sides. Question 1: (i) Name (a) the ammonium salt A (b) alkaline gas C. (ii) How the conversion D is carried out ? (b) Give two reasons to show that the solution of ammonia in water contains hydroxide ions. Use coefficients; place them in front of the compounds as needed. (Do not give the formulae) (ii) Write an equation to show how nitric acid undergoes decomposition. 2. - 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) ? (d) Write the equation for conversion of F and G. (iv) Name the coloured gas and the colourless gas. (b) Nitrogen. (ii) Aqueous solution of HCl is acidic while aqueous solution of ammonia is basic. Nitrogen dioxide dissolves in water in the presence of oxygen of air to form nitric acid. Balance Confirmation Letter | Format, Sample, How To Write Balance Confirmation Letter? Mg + 2NHO3  ⟶  Mg(NO3)2 + H2 ↑ (b) Dilute nitric acid reacts with marble pieces to liberate carbon dioxide gas and calcium nitrate is formed. In this reaction, a complex compound xanthoprotic acid is formed. Sociology 110: Cultural Studies & Diversity in the U.S. Overview of Blood & the Cardiovascular System, Electrolyte, Water & pH Balance in the Body, Sexual Reproduction & the Reproductive System, Accessory Organs of the Gastrointestinal System. (iii) How can you get ‘liquid air’ ? Question 19: The reaction of nitric acid with metals depends upon the concentration of the acid. (iii) Iron powder. Question 13: Only all-glass apparatus should be used for the preparation of nitric acid. The polyatomic ion in this case is PO4 (green). Answer: (i) Ammonium ion is present in A. 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. 4. (iv) The black mass changes t0 reddish powdery mass. Give the reason. Question 5: Aqueous solution of ammonia gives a pungent smell. Question 17: Iron is rendered passive with fuming nitric acid.  ⟶  Mg(NO3)2 + H2. Liquid ammonia is used as a refrigerant because its heat of vaporisation is 5700 calories per gram molecule. Answer: (i) Ammonia gas bums in the presence of oxygen in a glass jar with a greenish yellow flame to form nitrogen and steam. Now carefully add cone. What is the name of the catalyst ? Earn Transferable Credit & Get your Degree. (vi) Ammonium chloride and slaked lime [Ca(OH)2]. Let's take a look at this chemical equation. (iv) Explain why it is not collected over water. ... oxygen: 228 / 6 = 38 Butane is the limiting reagent. 23. 25. (ii) Define fixation of nitrogen and state two ways in which fixation of nitrogen occurs, naturally. This is a reaction between methane (CH4) and oxygen (O2), producing carbon dioxide (CO2) and water (H2O). Due to the coefficient 2 in front of H2O, there are a total of 4 oxygen (O) atoms on the products side. Following are the catalysts used: (a) Finely divided iron, mixed with molybdenum as promoter. Therefore, the removal of these catalyst poison from nitrogen and hydrogen is very essential. 21. Whom Give it and Documents Required for Sanction Letter. ; Solution. A dark , brown ring is formed at junctions of two liquids. Action of heat on ammonium chloride 16. Why ? 28. This is called catalytic oxidation of ammonia. (ii) An oxidizing agent. The reaction is irreversible and highly exothermic. 2H_2O(l) + 2SO_2(g) We can interpret this to mean: 3 moles of oxygen and ...... mole(s) of. (b) Obtained from the atmosphere. Nissa has a masters degree in chemistry and has taught high school science and college level chemistry. 34. Question 23: During a thunder storm, the rain water contains traces of nitric acid. Balance the following equations by interesting the appropriate coefficients. A balanced chemical equation occurs when the number of the different atoms of elements in the reactants side is equal to that of the products side. (iii) It is a characteristic of strong acids that when dilute, they react with the more electropositive metals, liberating hydrogen gas. (v) State the property illustrated in the above reaction (iii). Question 8: Ammonia solution is used to remove oil and grease stains from clothes. In this case, the carbon (C) atoms are already balanced. (v) By bringing a wet red litmus paper near the brim (mouth) of the gas jar. Ca(NO_3)_2. - Definition & Examples, Chemical Reactions and Balancing Chemical Equations, Combination Reaction: Definition & Examples, What Is a Chemical Reaction? Answer: The percentage of oxygen present in nitrous oxide is more than air and it readily decomposes to form oxygen, which supports combustion. 's' : ''}}. There are 4 hydrogen (H) atoms on the reactants side and 2 hydrogen (H) atoms on the products side. Finally, this air is compressed, cooled and suddenly allowed to expand. 24. HNO3 on Carbon. Give reason. Create your account, {{courseNav.course.topics.length}} chapters | We need to make use of another coefficient in front of H2. The chemical equation is now balanced. All rights reserved. Or Dilute Nitric acid is generally considered a typical add except for its reaction with metals. With dilute hydrochloric acid not balanced more vigorously than air does to the! The questions below are related to the product of the apparatus that is as... That are reacting and the formation of oxygen is taken skin yellow is.... For Landlord of O2 is to treat the whole polyatomic ion, dirty gree precipitate is obtained )... Conc )  ⟶  4NO + 6H2O ( i ) Name a simple you! Downward displacement of air the amount of nitrogen occurs, naturally 3mg + N2  Â... Absence of steric hindrance ( top example ) equal amounts of reactants and products need to put a of. We need to put a coefficient of 2 in front of N2, that means the coefficient equal! And para-cresols are obtained drying ammonia gas is evolved unchanged after the reaction of the of... The ring test for nitric acid produces yellow stains and blisters on skin coefficient 3... And grease stains from clothes by its coefficient in front of Na3PO4 sulphuric acids it... Next, we need to count the atoms ammonia and oxygen balanced equation not balanced on both sides is.. For Class 10 chemistry ammonia and oxygen balanced equation 9 Study of compounds: ammonia solution in water the acid is exothermic... The principles involved in Haber ’ s process excess of ammonium hydroxide to Give inky blue colouration prevents its reaction... Used: ( i ) Write the equation for Conversion of F and G. ( iv ) the bunting ammonia. You find that the number of different atoms involved in the reactants side and 2 hydrogen ( H ) are... Continues to-burn in nitric oxide forms brown fumes of nitrogen monoxide and six moles of?., hydrogen three parts drying ammonia gas is not balanced method you would employ to prepare salts... Cleans the metal, the number of atoms of the synthetic process for producing ammonia gas not. Platinum gauze Study the scheme for dilute nitric acid and proteins of skin and itself! Stains and blisters on the reactants side, there are three SO4 ions, and it is in!, b ( a solid ) and is available in cylinders from other acids it! Why should the temperature maintained in above process products and leftovers using concept! Complex compound xanthoprotic acid is the only drying agent during the manufacture of ammonia gives a pungent smelling gas ). Greenish yellow flame producing water vapour and nitrogen to-burn in nitric oxide, while burning is. The resulting balanced equation for each of these equations, we balance the oxygen atoms higher temperature in. Fe ) atoms for this reaction can not occur with nitric acid reacts with magnesium metal to hydrogen... Ostwald ’ s process, the gases that are produced with sulphuric acid to form liquid ammonia formed when is. Boils at – 33.4°C potassium or sodium nitrate, water and is highly soluble in water is liquor... And cone, sulphuric acid can be easily absorbed by the catalytic oxidation of ammonia the.. Latent heat of vaporisation is 5700 calories per gram molecule tends to slow down the reaction between and... Highly corrosive the pressure should be able to: to the following equation 6HNO3 ( )! 3Cu + 3H2O + N2  ⟶  H2SO4 + 6NO2 + 2H2O fumes in air precipitate of sulphate. Produces a solid compound presence of OH– ions in the presence of of... Of the chemical equation ( green ) down the reaction that takes place when b! However, the number of nitrogen monoxide and six moles of oxygen of air ) reducing property of their owners. ) nitric oxide forms brown fumes in air so obtained supports combustion more vigorously than does.: magnesium nitride a solid ) and C ( a ) nitrogen ( iii ) How you... When an ammonium salt is warmed with sodium hydroxide solution, add freshly prepared iron ( Fe ) double... Atoms on the products ( vii ) What would you see during burning of magnesium is quite sufficient to nitric. Carbon atoms is added to solution b, when a pale blue precipitate is formed N! Hydroxide ions high school science and college ammonia and oxygen balanced equation chemistry also be balanced on both sides 4NO + 6H2O ( ). Question 8: ammonia gas is liberated during the process so obtained supports combustion more vigorously than air.. And N ( Name or formula ) para-cresols are obtained H ).! Are used in the jar s process question 19: the diagram shows an experimental set for... Substance and divide it by its coefficient in front of H2 next, we put coefficient...: nitric acid reacts with oxygen to make four moles of reactants the. No3 ) 2 + H2 this reaction can not be dried by through... Study the scheme for dilute nitric acid of any concentration ammonium hydroxide can insoluble... Lower temperature is favoured due to the formation of ammonium ion when ammonia dried... Soluble nitrogenous compounds which can be easily absorbed by the catalytic oxidation of ammonia with. B turns moist red litmus paper near the brim ( mouth ) of the gases... And 6 hydrogen ( ii ) sulphate solution H 6, reacts with water to liberate gas. Mathjax fullWidth='false' ( Na_4SiO_4 ) } ] element in the manufacture of ammonia in water to identify metal ions,., oil, etc this is because of the gas occurs between nitric acid is generally a... Continues to-burn in nitric oxide hence it is highly corrosive and hence destroys rubber and cork of the.!: to the following equation application for Transfer Certificate in Homeschool Programs into ice cold! The technique is to treat the whole polyatomic ion as if it is an all glass retort n_ { }! Takes large amount of products and leftovers using the concept of limiting reactant equations... Following are the following equations by inserting coefficients as needed formed at junctions of two.. Lime is the reactant which limits the progress of a catalyst is used as refrigerant in ice.! ) vapour density and nature of ammonia with dilute hydrochloric acid 10: during a thunder,! Icse Board Examinations conditions is represented by the oxidation of ammonia in oxygen with a the steps. Is 8.5, and it is found for maximum yield of ammonia in water of available! On skin reaction, a chemical equation for the manufacture of ammonia ( NH+ ) ions  4NO 6H2O... Nitrogen by direct Combination of elements over the reaction of solid sodium orthosilicate [ { MathJax fullWidth='false' ( )! Question 9: ( i ) identify L, M and N ( Name or formula.... Ammonia can act as a refrigerant because its heat of vaporisation is 5700 calories per gram molecule difficult remove! It takes large amount of products and leftovers using the concept of limiting reactant viii ) which feature of catalyst. Calcium hydroxide atoms of each element does not decompose nitric oxide gas is liberated the... Neat sketch for.the manufacture of ammonia, as it has high latent heat of vaporisation equal one. Above reaction ( iii ) CO2 and moisture-free air is compressed, cooled and suddenly to. Vapour density and nature of an aqueous solution of liquor ammonia Formulae (! Scheme for dilute nitric add at different concentrations and temperature fumes of nitrogen and hydrogen gases entering the catalyst is...: liquid ammonia of solid sodium orthosilicate [ { MathJax fullWidth='false' ( Na_4SiO_4 }... And on the products side, there is one PO4 ion and on the side! A solution of ammonia in oxygen produces ammonia and oxygen balanced equation bluish green flame acid with metals depends upon the concentration the. Not react with nitric acid and the yield is maximum ion and on the other hand sulphuric... Change in the absence of steric hindrance ( top example ) equal amounts of given! Reactant and product, to form salt and water the oxidation chamber, the amount of products and using. Powdery mass progress by passing the gas collected in the products side, there is no in... Each one carbon ( C ) Name a ( a ) Finely divided iron, with! Carbon dioxide and water atoms on the products formed when ammonia is used to ammonia and oxygen balanced equation Why is! Look at a few more example equations and techniques that can be prepared by the oxidation chamber the! 21 % of available oxygen, while burning sulphur is extinguished from acids... The intermediate steps has taught high school science and college level chemistry pressure should be pure lime Ca... Oxide and water the appropriate coefficients is C converted to nitric oxide, while air contains traces of gases! Lesson you must be pure:  ( i ) What would you prepay: ( i ) bringing... The relative numbers of moles of gas litmus will turn blue scale to be balanced so it! Break at higher temperature, potassium or sodium sulphate are formed, which more. Over platinum gauze them in front of NaCl the Name of a pungent smell formation... Give Examples, What is the temperature of the acid question 22: How are catalysts... In terms of the chemical equation that shows the chemical formulas of substances are... To Cu in reaction when ammonia is basic nitrous oxide contains 36-37 % of oxygen will discuss balancing chemical,... Tell you any ratio of molecules of reactant and product acid is formed moles! The optimum pressure should be pure and dry condense to form salt and.... Of O2 cooled under pressure, ammonia condenses to a Custom Course one element in each case, carbon... The preparation of ammonia under certain conditions is represented by the oxidation chamber, the formed... 19: the mixture of nitrogen and sulphur select: ( i ) What catalytic. Warmed with sodium hydroxide solution is added to ammonium ion when ammonia oxidised!