Give reasons for the following: Question 6. Solution 1 (2008). Answer: Question 4. State what is observed when nitric acid is kept in a reagent bottle for a long time. Give a reason why the brown ring does not settle down at the bottom of the test tube. Copper metal reacts with aqueous nitric acid to produce copper (II) nitrate, nitrogen dioxide and A: Nitrogen dioxide only B: Nitric oxide only C: Hydrogen D: Nitrogen dioxide and oxygen E: Nitrogen dioxide and carbon dioxide. Answer: In the presence of sunlight nitric acid decomposes even at room temperature to give nitrogen dioxide, water and oxygen. Metals and Non-metals Class 10 MCQs Questions with Answers. Answer: Copper Nitrate. 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. To help you to identify X, Y and Z, you are provided with the following experimental observations. HCl is not used as a reactant in the laboratory preparation of nitric acid. ), Fertilizers (Ammonium nitrate, calcium ammonium nitrate or C.A.N.). State whether each reaction is an example of thermal decomposition or thermal dissociation. Concentrated nitric acid vapours – condense and are collected in the water-cooled receiver. acid formed. Question 14. Answer: Question 5. Answer: With very dilute nitric acid. Give balanced equations for the following conversions A to E. Answer: 1. 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. acid). State one appropriate observation for — When crystals of copper nitrate are heated in a test tube. Answer: Nitric acid works as an oxidising agent. Cold, dilute, nitric acid reacts with copper to given, Hot, concentrated nitric acid reacts with sulphur to form. Fe (OH)3 + 3HNO3→ Fe (NO3)3 + 3H2O. Convert ammonia to nitric acid by the above process giving all conditions. Perform ring test in the laboratory in the presence of your teacher. 1. Uses of Nitric Acid 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. Heat on nitric acid. Nitric acid finds application in the purification of gold. 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. Jil Schosseler, Anna Trentmann, Bernd Friedrich, Klaus Hahn, Hermann Wotruba, Kinetic Investigation of Silver Recycling by Leaching from Mechanical Pre-Treated Oxygen-Depolarized Cathodes Containing PTFE and Nickel, Metals, 10.3390/met9020187, 9, 2, (187), (2019). This is because nitric acid is a strong oxidising agent. Name the gas produced in the reaction: Action of concentrated nitric acid on copper. Answer: Nitrogen dioxide. State how you would obtain (1) Hydrogen (2) Nitric oxide (3) Nascent chlorine – from nitric acid. Solutions for Class 9 Chemistry Maharashtra, 10 Nitric Acid. use of low temp, in the conversion of NO to NO. During the process, nitric acid itself gets reduced to various products (NO, NO2, N2O, NH3, etc.) Calcium starts floating because the bubbles of hydrogen gas formed stick to the surface of the metal. Write a balanced equation for – Ferric hydroxide reacts with nitric acid. Question 1. Question 1. (1) State the special feature of the apparatus used in the laboratory preparation of nitric acid? Question 5. Observing Acid-Metal Reactions. 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. Question 3. HNO, Three chemical products manufactured from nitric acid. Dilute nitric acid behaves as a typical acid in its reaction with most metals. The reaction mixture is not heated beyond 200 °C because at higher temperature: Sulphur is treated with concentrated nitric acid. Reaction of manganese with cold very dil. Answer: …. This is due to the formation of a thin oxide coating on the surface of the metal which prevents further action. The characteristics of copper, and the reaction of the metal with nitric acid Stable metal Vs. Strong oxidizer. (b) Copper when reacts with dilute HNO3 forms Copper nitrate, Nitric oxide and water. Solution 3 (2006). Rewrite the correct statement with the missing word/s: Magnesium reacts with nitric acid to liberate hydrogen gas. In what way is dilute nitric acid different from other acids when it reacts with metals. In redox reactions of metals with acid, the acid concentration and temperature change. Answer: CuCO3 + 2HNO3→ Cu (NO3)2 + H2O + CO2. State how atmospheric nitrogen converts itself to nitric acid. More Resources for Selina Concise Class 10 ICSE Solutions Name the catalyst used. When hot cone. S + 6 HNO 3 → H 2 SO 4 + 2H 2 O + 6NO 2 (b) Nitric acid showing acidic character: K 2 O + 2HNO 3 → 2KNO 3 + H 2 O. ZnO + 2HNO 3 → Zn(NO 3) 2 + H 2 O (c) Nitric acid acting as oxidizing agent. (b) Nitric acid showing acidic character: (c) Nitric acid acting as oxidizing agent. 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. HNO3. Answer: Metals, lying above hydrogen in the electro chemical series, give hydrogen from the acid. The ability of metals to be drawn into thin wires is known as Answer: Nitrogen dioxide. Related Questions to study. State the cation responsible for turning moist neutral litmus red on reaction with dil. Cu (s) + H 2 SO 4 (aq) ——> no reaction. In the laboratory preparation of nitric acid from – KNO3 or NaNO3 State. C + 4HNO 3 → CO 2 + 2H 2 O + 4NO 2 (b) Copper when reacts with dilute HNO3 forms Copper nitrate, Nitric oxide and water. Question 2. Write the equations for the following reactions: Dilute nitric acid and copper. Pure cone, nitric acid or fuming nitric acid renders the metal…………. H2SO4. Solution 6: (a) When carbon and conc. Ans. Answer: Step I Step II Step III 4NO2 + 2H2O → 4HNO3. Answer: Nitric acid oxidises iron(II) sulphate to iron (III) sulphate with the liberation of nitric oxide gas. Use all glass apparatus with no wooden or rubber cork. That is why dilute nitric acid is considered a typical acid for its reaction with metals. Zigya App. Silver is oxidized to +1 oxidation state. Dilute nitric acid is generally considered a typical acid except for its reaction with metals. It turns yellow because cone. Acid + Metal Word Equations Chemistry Tutorial Key Concepts. When ammonium nitrate is heated the products formed are nitrous oxide and steam. 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. Answer: Platinum. Question 13. Nitric acid, (HNO 3), is a colourless, fuming, and highly corrosive acid … Question 1. Question 1. Write equation for the same. Answer: Cu + 4HNO3 (cone.) Answer: The conditions which affect the decomposition of nitric acid are: Question 11. Thus, if the temperature is allowed to go beyond 200°C, the product (HNO3) obtained is not pure (colourless). Saw dust is organic in nature. Acid + Metal Oxide ⇨ Salt + Water Add to it – a freshly prepared saturated solution of iron [II] sulphate. Answer: Pb(NO3)2. Nitric acid, as a rule, does not carry on as an acid with metals to shape the comparing salt and free hydrogen. Ans. It should Question 2. It is due to the following reasons: Question 4(2). 2. The brown coloured NO2 dissolves in HNO3 to give it a yellow colour. Choose the correct word from the brackets to complete the sentence. State the change in colour of pure concentrated nitric acid on initial and prolonged decomposition. It is a powerful oxidizing agent and the nascent oxygen oxidises hydrogen in water. Fill in the blank from the choices given in the bracket: Question 1. State your observation when copper is heated with concentrated nitric acid in a hard glass test tube. Question 4. Answer: Question 3. Question 2. When it is left standing in a glass bottle, concentrated nitric add appears yellow. Answer: Pure or fuming nitric acid renders metals like iron (Fe) and Al- passive i. e., inactive. Nitric acid attacks proteins giving a yellow nitro compound known as xantho protein. It is because it does not liberate hydrogen gas when treated with metals. Therefore, nitric acid stains skin and renders wool yellow. What do you see when concentrated nitric acid is added to copper. HNO 3 reaction with water. Acidified iron (II) sulphate (with dil. In Latin, copper is known as cuprum, and its atomic number is 29. Question 2. COVID-19 is an emerging, rapidly evolving situation. The exothermicity of catalytic reaction helps in stopping external heating, there by saving on energy. It does, if the nitric acid is dilute. In redox reactions of metals with acid, the acid concentration and temperature change. (b) Most of the metals do not give hydrogen while reacting with nitric acid because HNO 3 is a strong oxidising agent. Question 3. Answer: Question 2. Answer: [NO–] Nitrate, Question 2. Five different products can be retrieved with the help of the device. Magnesium, manganese, and zinc liberate H 2 : Mg + 2 HNO 3 → Mg (NO 3) 2 + H 2 (Magnesium nitrate) Answer: Hydrogen |H+| ions and Nitrate ions. Access the complete Selina Solutions for ICSE Class 10 Chemistry Chapter 10 Study of Compounds C. Nitric Acid at TopperLearning. 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. Thus, it cannot be concentrated by boiling. HNO3. Give balanced equations for the following: (1) Laboratory preparation of nitric acid. nitric acid reacts with copper to form________(Hydrogen, nitrogen dioxide, nitric oxide). (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. Question 3. Answer: All glass apparatus is used in the laboratory preparation of nitric acid. Answer: Question 15. It is used to create an inert atmosphere for welding and for carrying certain chemical reactions. When metal reacts with nitric acid (HNO 3), ... Identify the metal and its ore and give the reaction involved. By the end of the lesson, students should be able readily to draw the conclusion: Metal + acid … (2) State why the temperature of the reaction mixture of HNO3 is not allowed to rise above 200°C. Gradually the copper dissolves in dilute nitric acid to form greenish blue solution of copper (II) oxide. Write an equation for the following reaction: Copper and concentrated nitric acid. Answer: Sodium nitrate reacts with concentrated sulphuric acid to produce nitric acid. dilute nitric acid is generally considered a typical acid but not so in its reaction with metals. Name the chemical constituent of the brown ring ‘Y’. Nitric acid affects the skin if it accidently falls on it, staining the skin yellow. Question 2. 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. Question 5. Question 3. By the end of the lesson, students should be able readily to draw the conclusion: Metal + acid … The pale yellow colour of nitric acid disappears and hence it becomes colourless. Write the equation for the reaction in which copper is oxidized by concentrated nitric acid. Question 1. Answer: Nitric oxide (NO). d) Reaction with Metals. Answer: S + 6HNO3 → H2SO4 + 2H2O + 6NO2. Cold, dil. 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