Answer: Cu + 4HNO3 → Cu(NO3)2 + 2H2O + 2NO2, Question 4. Give a reason why the brown ring does not settle down at the bottom of the test tube. It attacks rubber and wooden corks. Give an equation for reaction of cone. Silver is oxidized to +1 oxidation state. Answer: C + 4HNO3 → 2H2O + 4NO2 + CO2. Add to it – a freshly prepared saturated solution of iron [II] sulphate. Silver reacts with nitric acid to give silver nitrate (AgNO 3), NO 2 and H 2 O. According to Divers, nitrous acid is not produced in appreciable amounts, because further reduction occurs which is due to the action of nascent hydrogen: Name the oxidised product when the following 1 to 5 react with nitric acid, Answer: 1. use of low temp, in the conversion of NO to NO. The brown coloured NO2 dissolves in HNO3 to give it a yellow colour. Nonetheless, magnesium and manganese are the main two metals, which react with cold and extremely dilute (1%) nitric acid to liberate hydrogen. You can refer to NCERT Solutions for Class 10 Science Chapter 3 Metals and Non-metals to revise the concepts in the syllabus effectively and improve your chances of securing high marks in your board exams. Also, learn the properties of nitric acid … The device utilizes a left hand and schematically indicates the product of reduction of nitric acid as a function of two factors: the activity of metal and the concentration of acid. Give reasons for the following: Iron is rendered passive with fuming nitric acid. Answer: Cu + 4HNO3 → Cu(NO3)2 + 2NO2 + 2H2O. Copper and Nitric Acid . ICSE SolutionsSelina ICSE SolutionsML Aggarwal Solutions, Viraf J Dalal Chemistry Class 10 Solutions and Answers, Simplified ChemistryEnglishMathsPhysicsChemistryBiology, Question 1. Since a chemical reaction between an acid and a metal will produce hydrogen gas, this can be used to determine whether a particular metal has reacted with an acid or not. Answer: Neutralization reaction. A: Nitrogen dioxide only B: Nitric oxide only C: Hydrogen D: Nitrogen dioxide and oxygen E: Nitrogen dioxide and carbon dioxide. Answer: (A) Cone, sulphuric acid (B) Potassium nitrate (Nitre). Copy and complete the following table relating to an important industrial process. Answer: Yellowish brown colour is changed to dark yellowish brown colour on prolonged decomposition. State why the unstable brown ring decomposes completely on disturbing. Equation 2 4 HNO 3 → 2 H 2 O + 3O 2 + 4NO The Nitric Acid decomposes in the intense heat produced by the high concentrate Sulphuric Acid used. Metals and Non-metals Class 10 MCQs Questions with Answers. During the process, nitric acid itself gets reduced to various products (NO, NO2, N2O, NH3, etc.) The p-Block Elements. Share Tweet Send [Deposit Photos] Cop­per is one of the old­est known met­als, which has been used by peo­ple from an­cient times. Name the gas produced when copper reacts with concentrated nitric acid. It oxidises the H 2 produced to water and itself gets reduced to any of the nitrogen oxides (N 2 O, NO, NO 2). Fill in the blank from the choices given in the bracket: Question 1. Acid + Metal Word Equations Chemistry Tutorial Key Concepts. Nitric acid attacks proteins giving a yellow nitro compound known as xantho protein. What compounds are required for the laboratory preparation of nitric acid. ... Aluminium is a reactive metal , yet is is used to make utensils for cooking. Answer: The conditions which affect the decomposition of nitric acid are: Question 11. State why hydrogen is liberated when zinc reacts with dil.HCl but not with dil. From the formulae listed below, choose, one, corresponding to the salt having the given description: AgCl, CuCO3, CuSO4. Question 1. Give balanced equations for: Oxidation of carbon with concentrated nitric acid. (b) Iron becomes inert when reacted with nitric acid due to the formation of extremely thin layer of insoluble metallic oxide which stops the reaction. Question 6 … The reaction of……….. (calcium carbonate / calcium oxide/ calcium sulphite) with dilute nitric acid is an example of a neutralization reaction. Nitric acid obtained in laboratory is pale yellow in colour. Cu (s) + H 2 SO 4 (aq) ——> no reaction. (1) Dissociation (2) decomposition Answer: Question 2. If the HNO3 is concentrated the gas produced is a mixture of oxides of nitrogen, because concentrated nitric acid is a powerful oxidizing agent and can oxidize free hydrogen to water. Brown coloured pungent smelling gas – nitrogen dioxide (NO. Focus on Nitric Acid is the Most important Chapter in ICSE Class 10 Chemistry. In the laboratory preparation of nitric acid, an all glass apparatus is used. Question 1. 4. Answer: On heating this salt, a brown-coloured gas is evolved is Ca(NO3)2, Question 1. Identify the gas evolved when: Question 2. It should P 4 +20HNO 3 → 4H 3 PO 4 + 4H 2 O + 20NO 2. (b) Copper when reacts with dilute HNO3 forms Copper nitrate, Nitric oxide and water. 2. Answer: Reddish brown gas is liberated residue is yellow when hot and white when cold. Question 21. Question 2. By the end of the lesson, students should be able readily to draw the conclusion: Metal + acid … ), Fertilizers (Ammonium nitrate, calcium ammonium nitrate or C.A.N.). Answer: Nitrogen dioxide. Solution 1 (2008). Use all glass apparatus with no wooden or rubber cork. Dilute nitric acid is generally considered a typical acid except for its reaction with metals. Related Questions to study. Nitric acid is a powerful oxidising agent and hence corrodes rubber or any other stoppers to avoid corrosion, we use all glass apparatus. Output refers to the product of the process not the intermediate steps. Answer: Question 4. Question 3. Give two general uses of HNO3. HCl is not used as a reactant in the laboratory preparation of nitric acid. Question 1. State your observation when copper is heated with concentrated nitric acid in a hard glass test tube. Nitric acid | HNO3 | CID 944 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. NO and N 2 O. If you have any doubts, please comment below. Question 18. Impurities like Cu, Ag, Zn, etc. (b) Most of the metals do not give hydrogen while reacting with nitric acid because HNO 3 is a strong oxidising agent. nitric acid. dissolve in nitric acid. Give a word equation and balanced molecular equation for the laboratory preparation of nitric acid from (1) KN03 (2) NaNO3. A: Cu + 4HNO3→ Cu (NO3)2 + 2H2O + 2NO B: C : 2. Buff coloured residue of PbO is obtained in the test tube. Name the chemical constituent of the brown ring ‘Y’. Unlike other dilute acids only very dilute nitric acid (1%) reacts exclusively with Magnesium or … Write balanced chemical equation for: Action of hot and concentrated nitric acid on copper. In redox reactions of metals with acid, the acid concentration and temperature change. State two conditions which affect the decomposition of nitric acid. Gradually the copper dissolves in dilute nitric acid to form greenish blue solution of copper (II) oxide. Copper metal reacts with nitric acid according to the reaction 3Cu + 8HNO 3 ----> 3Cu(NO3 )2 + 2NO + 4H2O If 18.75 g Cu(NO3 )2 is eventually obtained, then how many grams of nitric oxide (NO) would have also formed according to the preceeding equation. Question 3. Name three chemical products manufactured from nitric acid. Give a balanced equation for the reactions: Dilute nitric acid and Copper carbonate. ; Reactions between acids and the most reactive metals will result in vigorous fizzing as hydrogen gas is rapidly produced. Heat on nitric acid. State the change in colour of pure concentrated nitric acid on initial and prolonged decomposition. Select the correct word from the list in bracket to complete each statement. Solutions for Class 9 Chemistry Maharashtra, 10 Nitric Acid. Sodium Bisuiphate + Nitric acid NaNO3 + H2S04 (conc.) Question 2. This is because at higher temperatures, HNO3 decomposes to give NO2. State the concentration of nitric acid used in each case. Answer: Cone. Similarly, phenol reacts with nitric acid in the presence of H2SO4 to give trinitrophenol (known as picric acid). Answer: Metals low in activity series can be obtained by reducing their sulphides or oxides by heating. The yellow colour of nitric acid obtained in the laboratory is removed by babbling air through it. Question 3. Instead it liberates oxides of nitrogen, such as nitric oxide, nitrogen dioxide, etc., as it is very powerful oxidising agent. Answer: Question 5. Question 2. HNO3 with (1) carbon (2) copper. From the substances – Ammonium sulphate, Lead carbonate, Chlorine, Copper nitrate, Ferrous sulphate — State: A compound which releases a reddish brown gas on reaction with concentrated sulphuric acid and copper turnings. Solution 3 (2006). Answer: Question 1. In this reaction, salt and water are formed. Perform ring test in the laboratory in the presence of your teacher. Answer: Cu + 4HNO3 (cone.) The method of identification of the product i.e. (c) Zinc reacts with nitric acid to form Zinc nitrate, nitric oxide and water. Action of cold and dilute nitric acid on copper. In redox reactions of metals with acid, the acid concentration and temperature change. Question 2. 1. Answer: Step I Step II Step III  4NO2 + 2H2O → 4HNO3. It is because at 68% concentration it forms a constant boiling mixture, i.e., if heated beyond this concentration then proportion of water vapour and nitric acid vapour, leaving the dilute acid does not change. Question 5. Which of the two solutions – iron (II) sulphate or cone, sulphuric acid, do ‘X’ and ‘Z’ represent. The second class of metals includes zinc, magnesium, aluminium, cadmium, tin, lead, iron, and the alkali metals, and no nitrous acid is required to start their reaction with nitric acid. (b) A freshly prepared ferrous sulphate solution is used because on exposure to the atmosphere, it is oxidized to ferric sulphate which will not give the brown ring. Nitric acid is heated the products formed are Carbon dioxide, Nitrogen dioxide and water. Nitric acid does not liberate hydrogen. State one appropriate observation for — When crystals of copper nitrate are heated in a test tube. Answer: Question 1. Correct the following statements.Copper reacts with nitric acid to produce nitrogen dioxide. Answer: Cu + 4HNO3 (cone.) Question 16. D. N 2 O and NO 2. Name a solution which gives nitrogen dioxide with copper. 3Cu + 8HNO 3 → 3Cu (NO 3) 2 + 4H 2 O + 2NO (zinc/copper/iron) passive or inactive. Observing Acid-Metal Reactions. Concentrated nitric acid vapours – condense and are collected in the water-cooled receiver. Question 1. Copy and complete the corresponding inferences in. Reaction of carbon with cone, nitric acid. Fill in the blanks using the appropriate words given in the bracket below: (sulphur dioxide, nitrogen dioxide, nitric oxide, sulphuric acid), Question 1. Write a balanced equation for – Ferric hydroxide reacts with nitric acid. (b) Nitric acid showing acidic character: (c) Nitric acid acting as oxidizing agent. The characteristics of copper, and the reaction of the metal with nitric acid Stable metal Vs. Strong oxidizer. Give balanced equations for the following conversions A to E. Answer: 1. Question 3. Answer: Metals, lying above hydrogen in the electro chemical series, give hydrogen from the acid. Question 2. The non metal is Sulphur which reacts with concentrated nitric acid to form its own acid as one of the product. State which reaction of ammonia forms the first step of Ostwald’s process. When hot cone. Question 7. COVID-19 is an emerging, rapidly evolving situation. Answer: (1) X = Copper nitrate [Cu(NO3)2] Y = Nitrogen gas (NO2) (2) (3) Cu(NO3)2 + H2S → CuS ↓+ 2HNO3, Question 1. → 3Fe2(SO4)3 + 4H2O +2NO The nitric oxide so formed reacts wtih more of iron(II) sulphate to form nitrosoferrous sulphate, which appears in the form of brown ring at the junction of liquids. Question 12. Answer: With very dilute nitric acid. Cold, dilute, nitric acid reacts with copper to given, Hot, concentrated nitric acid reacts with sulphur to form. HNO3 decomposes by the action of sunlight to give brown coloured NO2 The brown coloured NO2 dissolves in cone. Nitric acid prepared in the laboratory is yellow in colour due to the dissolution of. Question 1. Answer: 3Cu + 8HNO3 → 3Cu(NO3)2 + 4H2O + 2NO. When ammonium nitrate is heated the products formed are nitrous oxide and steam. Nitric acid act as solvent for large number of metals. Question 19. In this article, we have given step by step procedure to perform an experiment which will help you understand the different properties of acids.Read the article carefully to understand the aim, apparatus, procedure and the reactions taking place during the experiment. Question 13. Convert ammonia to nitric acid by the above process giving all conditions. Five different products can be retrieved with the help of the device. Equation 3 2Fe 2 (SO 4 ) 3 + 2H 2 + 4NO → 4[Fe(H 2 O)5NO]SO 4 + 2H 2 SO 4 The [Fe(H 2 O) 5 NO]SO 4 forms a brown ring in the middle of the solution produced by the reaction, making it easy to identify the presence of nitrates in the water. It is because it does not liberate hydrogen gas when treated with metals. Acid Base Reaction with Metal - Experiment: Class 10 Science Question 2. Metal oxides are basic in nature. Answer: Pure or fuming nitric acid renders metals like iron (Fe) and Al- passive i. e., inactive. → Cu (NO3)2 + 2H2O+ 2NO2, Question 4. Question 4. Question 10. 5H2O, KNO3, NaCl, NaHSO,, Pb(NO3)2, ZnCO3, ZnSO4.7H2O. Question 3. HCl. (d) The temperature of the mixture of concentrated sulphuric acid and sodium nitrate should not exceed 200°C because sodium sulphate formed at higher temperature forms a hard crust which sticks to the walls of the retort and is difficult to remove. Answer: The oxidising property of nitric acid is based on the fact that when nitric acid undergoes decomposition, it yields nascent oxygen, which is very reactive. Nitric acid, (HNO 3), is a colourless, fuming, and highly corrosive acid … Kinetics of metal reaction in nitric acid, and maybe the possibility of formation of different reaction gaseous products (N 2 O, N 2, NO, NO 2,NH 3, 2 and H 2, 3) are also influenced by the shape of metal; for example, a piece of thin wire or powder. More Resources for Selina Concise Class 10 ICSE Solutions Answer: Nitric acid is highly corrossive and a strong oxidising agent. X, Y and Z are three crystalline solids which are soluble in water and have a common anion. Answer: Nitric acid, Question 4. Question 4. Hence, during the reaction between a metal and nitric acid, hydrogen gas is not formed. State a reason for the inactivity of iron and aluminium on reaction with fuming HNO3. Choose the correct word from the brackets to complete the sentence. Explosives (T.N.T., picric acid, nitrocellulose etc. Answer: In the presence of sunlight nitric acid decomposes even at room temperature to give nitrogen dioxide, water and oxygen. Answer: Question 15. It does, if the nitric acid is dilute. State your observation when (1) nitric acid is added to saw dust (2) cone, nitric acid is heated (a) in absence of copper (b) in presence of copper. Answer: CuCO3 + 2HNO3→ Cu (NO3)2 + H2O + CO2. Question 4(3). Answer: All glass apparatus is used in the laboratory preparation of nitric acid. The reaction mixture is not heated beyond 200 °C because at higher temperature: Sulphur is treated with concentrated nitric acid. → H2O + 2NO + 3[O] This nascent oxygen oxidises metals, non-metals, organic and inorganic compounds. A catalyst used in the manufacture of nitric acid by Ostwald’s process. Cold, dil. In what way is dilute nitric acid different from other acids when it reacts with metals. Answer: Sodium nitrate reacts with concentrated sulphuric acid to produce nitric acid. Answer: Metals, lying above hydrogen in the electro chemical series, give hydrogen from the acid. acid). Answer: Formation of a hard residual crust of the corresponding sulphate [Na2SO4 or K2SO4] which being a -poor conductor of heat, sticks to the glass and cannot be easily removed from the apparatus. Write the balanced chemical equation for –. NO 2 and N 2 O. N 2 O and NO 2. Nitric acid affects the skin if it accidently falls on it, staining the skin yellow. HNO3, to give it a yellow colour. Saw dust is organic in nature. study of compounds ammonia and nitric acid. Add – cone, sulphuric acid carefully from the sides of the test tube. Question 5. → Cu (NO3)2 + 2H2O + 2NO2. HNO3. Table of Contents. Answer: The first step of Ostwald’s process involves catalytic oxidation of ammonia to nitric oxide and water (steam). Question 4. The common anion is the ion. Answer: Concentrated nitric acid (HNO3). Silver reacts with nitric acid to give silver nitrate (AgNO 3), NO 2 and H 2 O. Write an equation to show how nitric acid undergoes decomposition. 288 Views. Nitric acid and silver metal reaction. Question 2. Nitric acid, as a rule, does not carry on as an acid with metals to shape the comparing salt and free hydrogen. Answer: HNO3 (Nitric acid), Question 2. Give equations for the action of heat on – (1) NH4Cl (2) NH4NO3. Action of heat on a mixture of copper and concentrated nitric acid. Write a balanced equation for the reaction of cone. Answer: Copper Nitrate. State how you would obtain (1) Hydrogen (2) Nitric oxide (3) Nascent chlorine – from nitric acid. Dilute nitric acid is generally considered a typical acid except for its reaction with metals. Class 10 Class 12. Answer: Hydrogen |H+| ions and Nitrate ions. Thus, when an acid reacts with a metal oxide both neutralize each other. Access the complete Selina Solutions for ICSE Class 10 Chemistry Chapter 10 Study of Compounds C. Nitric Acid at TopperLearning. dilute nitric acid is generally considered a typical acid but not so in its reaction with metals. Write the equation for the same. Choose from the list substances – Acetylence gas, aqua fortis, coke, brass, barium chloride, bronze, platinum. Name the gas evolved (formula is not acceptable). Write a balanced equation for the reaction of – sulphur and hot concentrated nitric acid. Reaction of sulphur with cone, nitric acid. d) Reaction with Metals. Answer: Cold, dilute nitric acid reacts with copper to form nitric oxide. Question 5. The ability of metals to be drawn into thin wires is known as Ans: Nitric acid is strong oxidizing agent thus it can oxidize the hydrogen gas liberated in the reaction into water. Name the gas produced in the reaction: Action of concentrated nitric acid on copper. concentrated hydrochloric acid is not used as a reactant in the laboratory preparation. Silver is oxidized to +1 oxidation state. H2SO4. By the end of the lesson, students should be able readily to draw the conclusion: Metal + acid … 6FeSO4 +3H2SO4 + 2HNO3 (dil. ) Give balanced equations for the following: (1) Laboratory preparation of nitric acid. In particular dilute nitric acid (< 0.5 M) does produce hydrogen with moderately reactive metals such as magnesium and zinc, even though reactions are different at higher concentrations, and with other metals. preparation of H2NO3 from potassium nitrate and cone. In case of nitric acid which is a strong oxidising agent, hydrogen produced in the nascent state reduces excess nitric acid and produces water and a reduction productof nitric acid. Convert nitric acid to sulphuric acid using a non-metal. This is due to the formation of a thin oxide coating on the surface of the metal which prevents further action. Zn + 2HCl(dil.) Nitric acid and silver metal reaction. A blue crystalline solid X on heating gave a reddish brown gas Y, a gas which re-lights a glowing splint and a residue is black Identify X, Y and write the equation for the action of heat on X. Nitric acid is a stronger oxidising agent in the cone, state of the acid than in the dilute state. State two relevant observations for : Lead nitrate crys­tals are heated in a hard glass test tube. H2SO4 4.Fe2(SO4)3 CO2. Answer: Platinum. Answer: The complete apparatus is made of glass only – since the vapours of nitric acid being highly corrosive and attack rubber, cork, etc. HN03 when added to copper turnings kept in a beaker. A non-metal which reacts with concentrated nitric acid to form its own acid as one of the product. Answer: Question 2. In Latin, cop­per is known as cuprum, and its atom­ic num­ber is 29. HNO3. C + 4HNO 3 → CO 2 + 2H 2 O + 4NO 2 (b) Copper when reacts with dilute HNO3 forms Copper nitrate, Nitric oxide and water. State  how atmospheric nitrogen converts itself to nitric acid. Question 2. It is a powerful oxidizing agent and the nascent oxygen oxidises hydrogen in water. 202 Qs. 10HNO 3 … Give reasons for the following: Question 6. Answer: …. Question 3. When metal reacts with nitric acid (HNO 3), ... Identify the metal and its ore and give the reaction involved. However, the reaction usually is performed by reacting iron oxide with aluminum: Fe 2 O 3 + 2Al → 2Fe + Al 2 O 3 + heat and light If you want a truly stunning display, try placing the mixture inside a block of dry ice and then lighting the mixture. asked Jan 28, 2019 in Class X Science by priya12 (-12,630 points) The reaction of nitric acid with metals depends upon the concentration of the acid. A reddish-brown gas is obtained when X, Y and Z are separately warmed with concentrated sulphuric acid and copper turnings added to the mixture. Write the equation for the reaction in which copper is oxidized by concentrated nitric acid. It oxidises the hydrogen gas to form water. The yellow colour of cone, nitric acid is due to NO2 dissolved in it. (b) Nitric acid undergoes decomposition as follows: ICSE Rankers is a free educational platform for icse k-12 students. nitric acid reacts with copper to form________(Hydrogen, nitrogen dioxide, nitric oxide). D : S + 6HNO3→ H2SO4 + 2H2O + 6NO2 E : 3SO2 + 2H2O + 2HNO3 → 3H2SO4 + 2NO, Question 4. Thus, it cannot be concentrated by boiling. State why nitric acid is a strong oxidising agent and yields varying products such as NO, NO2 on reaction with metals,non-metals etc. Uses of Nitric Acid Oxygen produced relits a glowing splinter. The reaction temperature is maintained below 200°C Answer: The reaction temperature is maintained below 200°C. Match each substance A to E listed below with the appropriate description given below.| (A) Sulphur (B) Silver chloride (C) Hydrogen chloride (D) Copper (II) sulphate (E) Graphite. Answer: Platinum. From the list of the following salts — AgCl, MgCl2, NaHSO4, PbCO3, ZnCO3, KNO3, Ca(NO3)2 State the salt which on heating, evolves a brown coloured gas. depending upon the concentration of the acid, reaction temperature and activity of the metal with which it is reacting. Solution 6: (a) When carbon and conc. dilute nitric acid is generally considered a typical acid but not so in its reaction with metals. (2) Action of heat on a mixture of copper and concentrated nitric acid. Question 5. The complete apparatus in the laboratory preparation does not contain parts made of rubber or cork. Control the temperature carefully at nearly 200 °C. Nitric acid on exposure to sunlight, slowly decomposes to form nitrogen dioxide gas which is reddish brown in color/. If the HNO3 is concentrated the gas produced is a mixture of oxides of nitrogen, because concentrated nitric acid is a powerful oxidizing agent and can oxidize free hydrogen to water. Reaction of Acid and Base Reaction of Base with a Metal. Write a balanced equation for the reaction of cone. Answer: S + 6HNO3 → H2SO4 + 2H2O + 6NO2. Question 3. State whether each reaction is an example of thermal decomposition   or thermal dissociation. This acid is prepared by reaction of nitrogen dioxide (NO 2) with water.The commercial production of nitric acid is by oxidizing anhydrous ammonia to nitric oxide, in the presence of a platinum catalyst at a high temperature (Ostwald process). When it is left standing in a glass bottle, concentrated nitric add appears yellow. Nitric acid combines with protein of the skin forming a yellow compound Xanthoproteic acid, stains skin yellow. H2SO4 2. Dilute nitric acid behaves as a typical acid in its reaction with most metals. With cold, ... IIT Foundation & Olympiad Class 10 Chemistry Chapter 8 & 9. Answer: Question 3. Answer: Copper reacts with concentrated nitric acid to produce nitrogen dioxide. HNO 3 acid dissociate completely in the water and release hydronium ion (H 3 O +) in the water to form strong acid … That is why dilute nitric acid is considered a typical acid for its reaction with metals. The pale yellow colour of nitric acid disappears and hence it becomes colourless. Question 4. HNO3. Reaction with metals: To give nitrates and nascent hydrogen: M + HNO 3 ---> metal nitrates + [H] + This nascent hydrogen can bring about reduction of substance: Example: Please note certain metals like chromium, aluminium do not dissolve in nitric acid due to formation of passive layer of oxide film on it which prevents further reaction. A hard glass test tube helps in stopping external heating, there by on. Metals to shape the comparing salt and free hydrogen acid oxidises the hydrogen produced to water oxygen! Directly to sulphuric acid carefully from the acid rubber or any other stoppers to avoid corrosion, we all. If the conditions are right, just about any metal will burn details depend on the layer. Identify the metal two conditions which affect the decomposition of nitric acid finds application in the ring. Be removed by rubbing the surface layer with the missing word/s: Magnesium with... Why hydrogen is liberated process not the intermediate steps the add to the! State why a yellow compound Xanthoproteic acid, reaction temperature is allowed go! Sand paper or by treating with strong reducing agent ( concentrated / dilute sulphuric. ( steam ) redox reactions of metals with acid, the acid — the acid — reaction of metal with nitric acid class 10 than! Viraf J Dalal Chemistry Class 10 Chemistry Chapter 10 Study of compounds C. nitric acid for... Yellow compound Xanthoproteic acid, nitrocellulose etc. ) num­ber is 29 on reaction metals! On copper corrossive and a strong oxidising agent ( Nitre ) 1 ) NH4Cl ( 2 ) copper ) why! Draw the conclusion: metal + acid … Observing Acid-Metal reactions NaNO3 + H2S04 ( conc. ) with of. Brown-Coloured gas is rapidly produced H2S04 ( conc. ) 3 → 4H 3 PO 4 + 2... Impurities like Cu, Ag, Zn, etc. ) forms a crust and sticks to the coloured! It liberates oxides of nitrogen dioxide, nitric oxide and nitrate which stops further reaction Chapter metals... Liberated residue is yellow when hot and cone, state of the metal Solutions Viraf. One observation for the following reaction: between copper and concentrated nitric acid renders the metal………… nitric appears... Smelling gas – nitrogen dioxide, etc., as a reactant in the from... Formulae listed below, choose, one, corresponding to the above laboratory of. Convert ammonia to nitric oxide, nitrogen dioxide gas are evolved the nascent oxygen oxidises hydrogen in electro! The reactions: dilute nitric acid crys­tals are heated in a test for reaction... 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