Excess of air carries the reactions in forward direction as oxygen is needed in all the three reactions, leading to the formation of nitric acid. (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: Zinc displace hydrogen from dil. 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. Get … 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. → 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. State your observation when copper is heated with concentrated nitric acid in a hard glass test tube. In the laboratory preparation of nitric acid, an all glass apparatus is used. }. 5H2O, KNO3, NaCl, NaHSO,, Pb(NO3)2, ZnCO3, ZnSO4.7H2O. HNO3 when added to copper turnings kept in a beaker. COVID-19 is an emerging, rapidly evolving situation. → Cu (NO3)2 + 2H2O + 2NO2. Sodium nitrate reacts with — (concentrated / dilute) sulphuric acid to produce nitric acid. Metals and Non-metals Class 10 MCQs Questions with Answers. If the conditions are right, just about any metal will burn. Nitrogen dioxide gas redissolves in the nitric acid and imparts it yellow colour. Table of Contents. Answer: (1) (2) Sodium Nitrate + Sulphuric acid (conc.) Solution 6: (a) When carbon and conc. The NO2 so produced dissolves in cone. Nitric acid is a stronger oxidising agent in the cone, state of the acid than in the dilute state. Identify the acid — The acid which is prepared by catalytic oxidation of ammonia. It is due to the following reasons: Question 4(2). Name the gas evolved (formula is not acceptable). Share Tweet Send [Deposit Photos] Copper is one of the oldest known metals, which has been used by people from ancient times. 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. Answer: Question 2. → Cu (NO3)2 + 2H2O+ 2NO2, Question 4. Copper and Nitric Acid . Answer: Hot and cone, nitric acid will oxidises sulphur directly to sulphuric acid. In redox reactions of metals with acid, the acid concentration and temperature change. When it is left standing in a glass bottle, concentrated nitric add appears yellow. Therefore, all glass apparatus should be used for the preparation of nitric acid in the laboratory. (b) When Cupric oxide reacts with dilute nitric acid, it forms Copper nitrate. Question 4. Nitric acid being a strong oxidising agent decomposes to give nascent oxygen, which being very reactive, oxidises organic compounds to carbon dioxide and water. With cold, ... IIT Foundation & Olympiad Class 10 Chemistry Chapter 8 & 9. HNO3. During lightning discharge, nitrogen in the atmosphere reacts with oxygen to form nitric oxide and further to nitrogen dioxide. HNO3. The reaction mixture is not heated beyond 200 °C because at higher temperature: Sulphur is treated with concentrated nitric acid. Answer: Nitric acid is highly corrossive and a strong oxidising agent. Write the balanced chemical equation for –. Write a balanced equation for the reaction of cone. (1) The reaction between a metal and an acid can be represented by the general word equation shown below: acid + metal → salt + hydrogen gas Copy and complete the following table relating to an important industrial process. Nitric acid affects the skin if it accidently falls on it, staining the skin yellow. The gas produced by the action of dilute nitric acid on copper. Silver is oxidized to +1 oxidation state. Question 1. Select the correct word from the list in bracket to complete each statement. Nitric acid, (HNO 3), is a colourless, fuming, and highly corrosive acid … Answer: 3Cu + 8HNO3 → 3Cu(NO3)2 + 4H2O + 2NO. The reaction of……….. (calcium carbonate / calcium oxide/ calcium sulphite) with dilute nitric acid is an example of a neutralization reaction. Nitric acid is a strong oxidising agent. Reaction of zinc with dilute nitric acid gives _____ gas. 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. Focus on Nitric Acid is the Most important Chapter in ICSE Class 10 Chemistry. The compound which is responsible for the brown ring in the brown ring test for identify the nitrate ion. Dilute nitric acid is generally considered a typical acid except for its reaction with metals. Cone. nitric acid. → H2O + 2NO2 + [O] 2HNO3 (dil.) Question 3. Acid + Metal Word Equations Chemistry Tutorial Key Concepts. When metal reacts with nitric acid (HNO 3), ... Identify the metal and its ore and give the reaction involved. 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. Question 1. 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. Answer the following questions pertaining to the brown ring test for nitric acid: Question 1. 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. The reduction product depends on the dilution of the acid. Nitric acid on exposure to sunlight, slowly decomposes to form nitrogen dioxide gas which is reddish brown in color/. Nitric acid reacts with most metals, but the details depend on the concentration of the acid and the nature of the metal. Question 12. At high temperatures the sodium sulphate or phtassium sulphate formed, forms a crust and sticks to the glass apparatus. Answer: Question 2. Answer: Nitric acid works as an oxidising agent. X, Y and Z are three crystalline solids which are soluble in water and have a common anion. Answer: C + 4HNO3 → 2H2O + 4NO2 + CO2. (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. Solutions for Class 9 Chemistry Maharashtra, 10 Nitric Acid. (b) Copper when reacts with dilute HNO3 forms Copper nitrate, Nitric oxide and water. Answer: Question 5. Answer: Reddish brown gas is liberated residue is yellow when hot and white when cold. concentrated hydrochloric acid is not used as a reactant in the laboratory preparation. HNO3 decomposes by the action of sunlight to give brown coloured NO2 The brown coloured NO2 dissolves in cone. Give two general uses of HNO3. Related Questions to study. State two relevant observations for : Lead nitrate crystals are heated in a hard glass test tube. (2) State why the temperature of the reaction mixture of HNO3 is not allowed to rise above 200°C. Extra Questions for Class 10 Science Chapter 3 Metals and Non-metals with Answers Solutions. Answer: Nitric acid oxidises iron(II) sulphate to iron (III) sulphate with the liberation of nitric oxide gas. The oxidised product obtained on reaction of H. Aqua regia is a mixture of one part of…………… and three parts of……… (cone, hydrochloric acid/conc. Question 2. In what way is dilute nitric acid different from other acids when it reacts with metals. Nitric acid, as a rule, does not carry on as an acid with metals to shape the comparing salt and free hydrogen. Answer: Platinum. State which reaction of ammonia forms the first step of Ostwald’s process. 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. Saw dust is organic in nature. It should 10HNO 3 … During the reaction it produces Nitrous acid and Zinc nitrate. State the cation responsible for turning moist neutral litmus red on reaction with dil. Question 2. A catalyst used in the manufacture of nitric acid by Ostwald’s process. Answer: A pungent smelling reddish brown coloured gas (NO2) is produced and the solution turns greenish blue. Answer: CuCO3 + 2HNO3→ Cu (NO3)2 + H2O + CO2. HN03 when added to copper turnings kept in a beaker. Give reasons for the following: Iron is rendered passive with fuming nitric acid. Give balanced equations for: Oxidation of carbon with concentrated nitric acid. The complete apparatus in the laboratory preparation does not contain parts made of rubber or cork. 5. Reaction of Acid and Base Reaction of Base with a Metal. Special Case of Nitric Acid: Nitric acid does not react with metals in the same way as hydrochloric acid or sulphuric acid do. 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. The common anion is the ion. Ans. Identify the following substances: a dilute acid B which does not normally give hydrogen when reacted with metals but does give a gas when it reacts with copper. 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