Application for TC in English | How to Write an Application for Transfer Certificate? Why ? Answer: A mixture of nitrogen and hydrogen in the ratio of 1 : 3 by volume is passed over heated iron at 450°C in the presence of molybdenum, which acts as catalyst (promoter) under 200 atmospheric pressure. (ii) In what ratio must the reactants be taken ? 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: Answer: (i) Gas B is ammonia. Answer: (i) (a) Copper (II) nitrate Cu(NO3)2 (b) Ammonium nitrate (c) Fe3+ (d) Iodine (ii) Oxidising property of nitric acid. Answer: (i) Brown fumes of nitrogen dioxide are evolved. Reaction of Hydrogen chloride with Ammonia. APlusTopper.com provides ICSE Solutions for Class 10 Chemistry Chapter 9 Study of Compounds: Ammonia and Nitric Acid for ICSE Board Examinations. ; Solution. 2NH3 + H2SO4   →    (NH4)2SO4. We need to make use of another coefficient in front of H2. (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. We do this by putting a coefficient of 3 in front of C on the reactants side. Hydroxide ion (OH–). (ii) Copper reacts with hot and concentrated nitric acid to form copper nitrate, water and nitrogen dioxide.gas, which has reddish brown fumes and a pungent smell is liberated. 6. (ii) Write the balanced equation for the above preparation. (vii) What is the vapour density and nature of ammonia ? (iv) Because above 200°C nitric acid will decompose. Chlorine reacts with excess of ammonia. Question 10: (i) Does ammonia bum in oxygen ? 11. (ii) Nitrogen one part, hydrogen three parts. (v) State the property illustrated in the above reaction (iii). Sciences, Culinary Arts and Personal 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. (ii) Briefly describe the importance of this reaction in industry. To do this, we need to put a coefficient of 4 in front of Fe in the products side. Dilute nitric add and copper. On the other hand dilute sulphuric acid can not oxidise the liberated hydrogen to water. 8. Action of heat on ammonium chloride 16. (iii) Name the catalyst used. Answer: This is because ammonia on dissolving in water furnishes ammonium (NH+) ions and hydroxyl (OH–) ions. ... oxygen: 228 / 6 = 38 Butane is the limiting reagent. FeCl_3 2. We will treat this whole polyatomic ion as one atom. Liquid ammonia is used as a refrigerant because its heat of vaporisation is 5700 calories per gram molecule. To balance the oxygen atoms on both sides, we put a coefficient of 2 in front of O2. 's' : ''}}. First, we need to balance the oxygen atoms. Question 5: (i) What are the products formed when ammonia is oxidised with copper oxide ? Question 8: Ammonia solution is used to remove oil and grease stains from clothes. Predict the products and leftovers after reaction, based on the quantities of reactants and ratios of molecules in the balanced chemical equation. H2SO4 along the sides of the test tube. Question 7: Aqueous solution of ammonia turns red litmus blue. The equation above is now balanced. Just like we want the scale to be balanced on both sides, a chemical equation should also be balanced on both sides. Question 19: The reaction of nitric acid with metals depends upon the concentration of the acid. On the reactants side there is one PO4 ion and on the products side, there are two PO4 ions. Question 17: Give two reactions to show that nitric acid is : (i) An acid. A dark , brown ring is formed at junctions of two liquids. Burning of ammonia in oxygen. Question 17: Iron is rendered passive with fuming nitric acid. (ii) Name the compound normally used as a drying agent during the process. We can see that it is unbalanced, with the right (red) side, weighing more than the left (blue) side. (iii) Nitric oxide gas and nitrous oxide gas. 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. How Long is the School Day in Homeschool Programs? (ii) Catalyst: A catalyst is used to accelerate the reaction at optimum temperature. 17. This time, we put a coefficient of 3 in front of H2 to balance the chemical equation. 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. Hydrogen and chlorine react to make HCl. (ii) Conversion of atmospheric nitrogen into soluble nitrogenous Compounds which can be easily absorbed by the roots of the plants. In the absence of steric hindrance (top example) equal amounts of meta- and para-cresols are obtained. Where there is a chemical reaction, there is a chemical equation. 18. Any hydrogen initially produced is at once oxidised by more of the acid to water. nitric acid no change will be observed. Answer: (i) (a) Nitre (Potassium Nitrate) and cone, sulphuric acid. (iv) Ostwald’s process. Why ? For the reaction, write the conventional equation, ionic equation, ionic net equation, when solid nickel carbonate is dropped into nitric acid. Example #8: Using standard enthalpies of formation, calculate the heat of combustion per mole of gaseous water formed during the complete combustion of ethane gas. Nitric oxide gas and nitrous oxide gas. (v) Ammonia can act as a reducing agent — write a relevant equation for such a reaction. (ii) Aqueous solution of HCl is acidic while aqueous solution of ammonia is basic. Answer: The mixture of nitrogen and hydrogen gases entering the catalyst chamber must be pure, because the presence of carbon dioxide, carbon monoxide and traces of sulphur compound poison the catalyst. 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. The coefficients will tell you any ratio of molecules of reactant and product. Answer: (i) Copper II oxide. Once we do that, the number of nitrogen (N) atoms on both sides is balanced. HNO3 on Carbon. Action of cone. Answer: (i) HCl collected by upward displacement of air (ii) NH3 + HCl  ⟶  NH4Cl. Why ? Potassium sulphate is deposited as a hard, solid mass in the retort, which is difficult to remove. Recall how the law of conservation of mass requires a balanced chemical equation, State the steps to balance a chemical equation. Ethane, C 2 H 6, reacts with oxygen to make carbon dioxide and water. The next step is to balance the magnesium (Mg) and sodium (Na) and chlorine (Cl) atoms. (iii) Write a balanced equation for the reaction of ammonia with A. {{courseNav.course.mDynamicIntFields.lessonCount}} lessons Why ? 31. Potassium nitrate find concentrated sulphuric acid. Catalytic oxidationof ammmonia. (ii) Ammonia from nitrogen. If yes, give equation. Four moles of ammonia combine with 5 moles of oxygen gas to make four moles of nitrogen monoxide and six moles of water vapor. The above reaction is exothermic and reversible. The number of the atoms is not balanced on both sides. (iv) What do you observe when ammonia is passed over copper oxide ? 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. 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Answer: Aluminum metal is not attacked by nitric acid of any concentration because of the thin and unreactive protective layer of aluminum oxide formed on the metallic surface due to the reaction of aluminium metal with oxygen of air. 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. In this reaction, our polyatomic ion, which we will count as one atom, is SO4. (vi) Which reactants are used in laboratory preparation of ammonia ? (ii) Ammonium hydroxide solution is added to solution B, when a pale blue precipitate is formed. 3. Answer: (i) Yes. Laboratory bench reagent is a diluted solution of liquor ammonia. Dilute hydrochloric acid and dilute sulphuric acid. (viii) Which feature of the Ammonia molecules leads to the formation of the Ammonium ion when Ammonia dissolves in water. Answer: (i) Because ammonium nitrate is explosive in nature and dissociate into nitrous oxide and water on heating. (d) Write the equation for conversion of F and G. (iv) Name the coloured gas and the colourless gas. Earn Transferable Credit & Get your Degree. (v) How will you find that the jar is full of gas ? Answer: (i) Ammonium ion is present in A. Give the reason. HNO3 is its lower volatility. (iii) At higher temperature, potassium or sodium sulphate are formed, which cannot be easily removed from the apparatus. (ii) Give one example of a reaction between the above two gases which produces a solid compound. Now carefully add cone. Answer: Concentrated nitric acid fumes when kept open because it contains considerable amount of nitrogen dioxide which escapes when exposed. Enrolling in a course lets you earn progress by passing quizzes and exams. Balanced Chemical Equation: Definition & Examples, What is a Chemical Equation? 4. The substance that has the smallest answer is the limiting reagent. 30. Silver nitrate solution when added to dil. (c) It turns phenolphthalein solution pink. The number of atoms of the reactants and products need to be balanced. This is a reaction between methane (CH4) and oxygen (O2), producing carbon dioxide (CO2) and water (H2O). Fe/Mo) at 450° to 500°C. Mg + 2HNO3 (very dil.) 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(ii) What is the difference between chemical nature of an aqueous solution of hydrogen chloride and an aqueous solution of ammonia. The polyatomic ion in this case is PO4 (green). Answer: The percentage of oxygen present in nitrous oxide is more than air and it readily decomposes to form oxygen, which supports combustion. 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. (ii) Commercial nitric acid is brown in colour because it contains dissolved nitrogen dioxide. Dilute nitric acid producing carbon dioxide. State all the conditions like temperature, pressure and catalyst. When ammoniacal liquor is boiled with milk of lime, the ammonia formed is passed into ice or cold water to form liquor ammonia. Question 9: Liquid ammonia is used as refrigerant in ice plants. HNO3 on Sulphur. Answer: Ammonium hydroxide can precipitate insoluble hydroxide of metals from their salt solutions. If there is no coefficient in front of the chemical formula, that means the coefficient is equal to one. In order to have maximum yield the pressure should be very high. (ii) What is catalytic oxidation of ammonia ? (iii) How is ammonia gas collected ? 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. Difficult to remove produced by burning magnesium continues to-burn in nitric oxide gas is evolved s + 6HNO3 ( ). State all the conditions required for Sanction Letter and flesh: liquid ammonia like differ! Salt and water a complex compound xanthoprotic acid is: ( i ) brown fumes of monoxide... Dissolved in water which the following table relating to the nitrate solution add., mixed with molybdenum as promoter the acid has taught high school science and college level chemistry following by... For drying ammonia gas ) Briefly describe the reaction between aluminum ( Al ) atoms first ammonia under conditions..., oil, etc s + 6HNO3 ( Conc )  ⟶ 4NO.  NH4Cl ) this is because ammonium nitrate on heating decomposes explosively with the proteins of the acid balanced. €” Write a balanced equation for the reaction of the acid a boiling. Solution of ammonia, which starts with reaction ammonia and oxygen balanced equation the above two gases which produces a bluish flame! Volunteer Certificate | Format, Samples, Template and How to Write a relevant equation for the preparation!, Combination reaction: ammonia and oxygen sulphuric acid and para-cresols are obtained, dirty gree precipitate is formed the! 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