( (iv)Copper displaces zinc from zinc sulphate solution. 8. Copper coils are used in several electrical appliances. (d) Coal can be drawn into wires. FeSO 4 (aq) + Zn (s) → ZnSO 4 (aq) + Fe (s). Distinguish between metals and non-metals on the basis of these properties. 1. It is used in the manufacture of sulphuric acid. What is the zinc In the sample provided?_____ How many moles of zinc are In this sample? As HNO3 is a strong oxidizing agent, it oxidizes the H2 to water and itself gets reduced to oxide of nitrogen (N2O, NO, NO2).Magnesium and Manganese react with very dil.HNO3 to give H2 gas.Mg(s) + 2HNO3 (aq) → Mg(NO3)2 + H2 ; Mn (s) + 2HNO3(aq) → Mn(NO3)2 + H2. Making x-ray shield and bullets: – lead7. This reaction shows that zinc is more reactive than copper as it displaces copper from its solution and zinc passes into solution as zinc ions and zinc sulphate solution is formed. c) Copper cannot displace zinc from its salt solution because Zinc is more reactive than copper. Zn(s)+ CuSo 4( aq)→ ZnSo4(aq)+ Cu(s) (b) When an aluminum metal reacts with dilute HCl(Hydrochloric Acid) to for Aluminum Chloride(AlCl3) and Hydrogen(g) will be evolved in the reaction. (b) A metal that displaces silver from silver nitrate solution. (a) When Zinc is added to the copper sulfate solution, then Zinc will displace copper from its position to form Zinc sulfate. ( ) (d) Coal can be drawn into wires. (a) Alnico(b) Solder(c) Stainless steel(d) Zinc AmalgamAnswer:(d), Question 12.Which of the following methods is suitable for preventing an iron frying pan from rusting? ( ) False (d) Coal can be drawn into wires. [ ] (b) Sodium is a very reactive metal. Answer. Generally, non-metals react with acids. (a) Generally, non-metals react with acids. Why silver and gold do not react with hydrochloric acid? This is indicated by colour change from blue to colourless. Question 15.From among the set of metals — sodium, zinc, iron, copper, silver, select the following giving equations for each reaction :(a) Two metals which will liberate hydrogen from water. (b) Sodium is a very reactive metal. It has been noticed that silverware becomes black faster today than it did fifty years ago. Ans: This is because silver and gold are less reactive than hydrogen. ( ) (d) Coal can be drawn into wires. ( ) (c) Copper displaces zinc from zinc sulphate solution. Ans: Aluminium is more reactive than zinc therefore displace zinc from Zinc sulphate solution and form salt with evolution of hydrogen gas. The activity shows that for rusting to take place, both air (oxygen) and water are essential. So aluminium is more reactive than zinc. (b) Immersion rods for heating liquids are made up of metallic substances. (ii) Iron (a) Diamond(b) Graph’ite(c) Fullerenes(d) CharcoalAnswer:(c), Question 11.Which among the following alloys contain mercury as one of its constituents? Silver is the best conductor of electricity Can you say why electric wires are not made of silver? Zinc is a chemical element with the symbol Zn and atomic number 30. 1. (iv) Alloying: An alloy is a mixture of two or more metals. What would happen to it in three days time ? Which gas will be liberated when metals react with cold water ? Close the test tube with a cork. False… The reaction of calcium with water is less violent. Copper will precipitate, as it has very low solubility. Fe + CuSO4 --> FeSO4 + Cu, Q.10 Saloni took a piece of burning charcoal and collected the gas evolved in a test tube. [ ] (d) Coal can be drawn into wires. (a) All metals are ductile. (b) Metals are good conductors of heat and __electricity__. and maintain their lustre for a long time. Mark ‘T’ if the statement is true and ‘F’ if it is false. (g) Non-metals react with water to form a gas which burns with a ‘pop’ sound. In this lesson, we're going to discuss the extraction of four metals: aluminum, copper, iron and zinc. Since Zinc is more reactive than Copper, Zinc displaces Copper from Copper sulphate to form Zinc sulphate and Copper. (a) Generally, non-metals react with acids. 7. Your email address will not be published. gas. Which metal is displaced during this reaction? 5. ( ) Answer: (a) Generally, non-metals react with acids. Your question has to be more specific and clearer, Mixing Zinc Metal with Solid Copper Sulphate will have NO reaction, But assuming the Copper Sulphate is in Aqueous/Molten State, The Zinc reacts with Copper Sulphate/Sulfate. A zinc electrode and a copper electrode are placed in a beaker containing an aqueous solution of zinc sulfate, ammonium citrate, and ammonium chloride. T. 3. What are noble metals? But all metals do not react in the same way with water. 3. (i) Both Assertion and Reason are true and the Reason is the correct explanation for Assertion. Mark ‘T’ if the statement is true and ‘F’ if it is false. How are these properties different in metals and non-metals? Ans: It is done by passing an electric current through sulphuric acid using aluminium rod as anode. It is used as a catalyst in the manufacture of sulphuric and nitric acid. 1:12 25.2k LIKES In the following question, a statement of Assertion (i) followed by a statement of Reason (R) is given. ( ) (a) Generally, non-metals react with acids. B ( ) (iii)Generally, non-metals react with acids. Give three examples of reactions between metals and water, to show that different metals have different relativities. 2. (C) False . 3. copper,aluminium. This reaction forms a gaseous mixture of carbon monoxide and hydrogen, called water gas. a. making statues b. joining wires in electronic equipmentsc. ... Copper displaces zinc from zinc sulphate solution. Cu + ZnSo4 ---> No reaction. (e) Copper displaces silver from silver nitrate but gold does not do this. The magnesium turns black as it becomes coated in a layer of lead that’s been displaced from the lead nitrate solution. A Zinc being a more reactive element (above copper in the reactivity series) than copper displaces copper from its compound. On addition of the zinc, the solution becomes colourless, and the silver zinc metal is replaced by red/brown copper metal. ( ) Answer: (i) Generally, non-metals react with acids. ( ) Answer: 1. Ans: (i) Metals combine with oxygen to form metal oxides.Eg. 3. But the tablets were not hard and did not look like iron at all. 4. (c) Copper cannot displace zinc from its salt solution. A dark coating of copper metal appears on the zinc within two minutes and when 45 minutes have elapsed, there is a thick coat of copper metal powder on the zinc strip and the blue color of the solution has lightened considerably. F. Question 7. Mark ‘T’ if the statement is true and ‘F’ if it is false. Filling electric bulb – Argon 2. copper sulphate and ironc. Coal can be drawn into wires. Silver is lower in the reactivity series than Zinc and therfore cannot displace the Sulphate from the Zinc. Which of the metals will react with oxygen when heated ? (a) Thermometers This metal (X) displaces copper from copper sulphate solution but does not displace zinc from zinc sulphate. (b) One metal which is used to prepare hydrogen gas in the laboratory. Conduction of Electricity, 1. 4. Q3. Answer: (a) False (b) True (c) False (d) False Metals have the property of sonorosity so they are used for making bells. Give reason: Chemical reaction does not take place when copper is added to iron sulphate solution. Potassium after combustion will form (acidic oxide/basic oxide). Give an example. Mark ‘T’ if the statement is true and ‘F’ if it is false. (d) Jewellery Which of the following statements is true about the reaction between zinc and copper sulfate? The copper sulphate solution is blue. ( ) Answer: 1. (b) All non-metals are ductile. The chemical reaction for the reaction between concentrated sulfuric acid and copper is: Question 5. Ans: The reaction of metals with oxygen, water and acids shows that metals have different reactivates.Potassium and sodium are the most reactive whereas silver and gold are the least reactive.An arrangement of metals in decreasing order of reactivity is called the reactivity series of metals. Uses of Copper Sulfate B 3. Iron is used in construction of bridges and houses. It is used to alter the properties of metals to suit certain applications. (f) Rust formed on iron objects is basic in nature. The two metals which … Zinc sulphate and magnesium Malleability Ans: An alloy is a mixture of two or more metals or one or more metals and a non-metal. 2. copper sulphate solution exists as cu+2 and so4-2 as it is a strong electrolyte.So,when copper sulphate solution is reacted with zinc powder, zinc displaces copper from copper sulphate. Statement-1: Zinc displaces copper from copper sulphate solution. ( )-a-FalseNon Metals do not react with acidFor exampleIf we take charcoal powder in a test tube and add hydrochloric acid in it.No reaction will take place-ea-(b) Sodium is a very reactive metal. Zinc displaces copper from copper(II) sulphate solution. Coal can be drawn into wires. 5. Mark ‘T’ if the statement is true and ‘F’ if it is false. 2Na + 2H2O ———–> 2NaOH + H2, (ii) Magnesium reacts with hot water or steam. Cu + H2SO4 (conc.)
Statement-2: The of Zn is -0.76 volts and that of Cu is +0.34 volts. Hence pickle is not stored in aluminium utensil. Close this test tube also with a cork. (a) Generally, non-metals react with acids. Give the names and composition of alloys that are used for the following. Zinc is more reactive than copper. 6. (d) Zinc sulphate and iron: A displacement reaction will not occur here because iron is placed below zinc. Why not? Thus, it will not replace zinc. State whether a displacement reaction will occur if the following are mixed. (c) Zinc sulphate and copper: A displacement reaction will not occur here because copper is placed below zinc. German silver has (copper/silver) as major constituent. True or False and correct the incorrect statements. Because when zinc is dipped into a copper sulfate solution, zinc becomes plated with copper. (b) Electric wire Metals like K and Na react vigorously with cold water to form hydrogen gas. (a) Dilute sulphuric acid is poured on a copper plate? The metallic oxide formed would be acidic or basic in nature ? Ans: When aluminium reacts with oxygen or water, it forms aluminium oxide which gets deposited as a thin layer on aluminium and presents further oxidation. ( ) (c) Copper displaces zinc from zinc sulphate solution. 4. (b) Metals are conductors of heat and ____________ . Why is graphite not used for making electric cable? Silver does not corrode and it is malleable and ductile, therefore, it can be used in jewellery. This method can be done by the following ways: (i) Galvanizing: Clean iron sheets are dipped in molten zinc to deposit a layer of zinc on it. ( ) The solvent extraction of zinc from copper-zinc sulphate solutions is a known process (Barthel et al., 1978 ), and it was thoroughly investigated for the recovery of both copper and zinc from the leach solution. A doctor diagnosed a patient with iron deficiency, and gave him tablets containing iron. Next day when they brought the jewellery back, they found that there was a slight loss in its weight. Ans: Graphite is a non metal that is brittle and cannot draw into wire. Identify the most reactive and least reactive metal amongst the followings : An iron knife kept dipped in blue copper sulphate solution changes to light green. pins, cooking utensils, electrical gadgets. Aluminium is used to make electrical wire. Coal can be drawn into wires. a. copper sulphate and zincb. Copper is used in electrical wiring because it is a good conductor of electricity. Question 14.State whether the following statements are True or False : 1. How many grams dry NH4Cl need to be added to 1.80 L of a 0.500 M solution of ammonia, NH3, to prepare buffer solution that has a pH of 8.53? Explain. Hit hard the aluminium wire also. Statement-1: Zinc displaces copper from copper sulphate solution. Appearance - lustrous (metals) - dull ( non-metals) (a) Thermometers. However, when concentrated sulphuric acid is poured on a copper plate, hydrogen gas evolves along with the formation of blue coloured copper sulphate crystals. In the periodic table, Aluminum is a metal of Group 13 and copper, iron and zinc are transition metals. Zinc is a slightly brittle metal at room temperature and has a blue-silvery appearance when oxidation is removed. Conduction of electrical - good conductor ( metals) - bad conductor (non metals), Q.6 Give reasons for the following. b) Immersion rods for heating liquids are made up of metallic substances because metals are good conductors of heat and electricity. Making pencil leads: – Graphite 6. Negative. (d) Metals react with acids to produce ____________ gas. (a) Both A and R are true and R is the correct explanation of A (b) Both A and R are true but R is not correct explanation of A (c) A is true but R is false Also write the equation of the reaction. Water purification: Chlorine 8. (c) Copper displaces zinc from zinc sulphate solution. Ans: Yes. Ans: If copper had been higher up in the reactivity series it would have been very reactive, and would not have been useful as it would have got easily corroded. (c) A metal which is used for galvanising iron. (a) Generally, non-metals react with acids. What would happen IF copper were to be dipped into a solution of zinc sulfate? 65. Ans: Tin is electroplated on iron to make food containers. During an experiment using a galvanic cell for a chemical reaction, a change in voltage recorded over time indicates the transfer of electrons. Answer: (a) False (b) True (c) False (d) False. 2. [ ] (c) Copper displaces zinc from zinc sulphate solution. Write word equations of the reactions involved. On dipping the gold jewellery in the acid solution, the outer layer of gold dissolves and the inner shiny layer appears. (a) Sulphur(b) Phosphorus(c) Carbon(d) BromineAnswer:(d), C. SHORTANSVVER QUESTIONS (TYPE I): Answer in a sentence or two. (c) Copper displaces zinc from zinc sulphate solution. ( ) (b) Sodium is a very reactive metal. Zinc sulphate and magnesium Aqua regia is a highly corrosive, fuming liquid. (a) How will she find the nature of the gas? Mark 'True' and 'False' of the following sentence: (i)Sodium is a very reactive metal. They do not losetheir shine easily. This happens because iron is more reactive than copper. the copper would not spontaneously become zinc plated. This should occur as zinc is higher in the reactivity series than copper. ( ) 4. (b) Covering with another metal: Depositing a layer of another metal which is more resistant to corrosion is another commonly used method. An alloy is usually made by mixing together metals in their molten form. (a) Generally, non-metals react with acids. Iron nails are placed in copper sulphate solution ? German silver has (copper/silver) as major constituent. 1. (a) No reaction occurs when dilute sulphuric acid is poured on a copper plate. Prediction I predict that this experiment should be a displacement reaction. Non-metals are generally (malleable/brittle). Dilute sulphuric acid is poured on copper plate ? Generally, non-metals react with acids. 1. Ans: Difference between the physical state of metals and non-metals:Metals are solid at room temperature except mercury which is liquid whereas non-metals are found in solid, liquid and gaseous state at room temperature like carbon, phosphorus, etc., are solids; bromine is a liquid while hydrogen,nitrogen, etc., are gases. Some properties are listed in the following Table. (d) A metal that reacts with oxygen without burning. (i) State the reason for changes observed on the zinc plate. Hardness - hard (metals) -soft ( non-metals) (v) Copper Oxygen is evolved at the anode which reacts with aluminium to form a uniform protective layer of aluminium oxide. 2. The blue color of the aqueous copper (II) sulfate solution is due to the presence of the hexaaquacopper (II) ion in water. 9. Answer: Copper is less reactive than zinc. 6. (d) Some non-metals are ductile. (b) Sodium is a very reactive metal. (c) One metal which will displace copper from copper sulphate solution. This is why graphite is not used for making electric cable. Which of the metals will react with oxygen when heated ? Pure gold cannot be used for making jewellery because it is very soft. True . The reaction between copper sulfate, CuSO_4(aq), and zinc, Zn(s) is an oxidation-reduction reaction in which zinc reduces the copper. We will find that the nails in test tubes A and B have not rusted, while that in test tube C has rusted. (c) Copper displaces zinc from zinc sulphate solution. However, if the tin layer gets scratched, the iron starts rusting at that place. NCERT Solutions Class 10 Science (Physics,Chemistry, Biology). Aluminium foils are used to wrap food items. b) Charcoal reacts with oxygen to form carbon dioxide gas. Immersion rods for heating liquids are made up of metallic substances. (a) Generally, non-metals react with acids. (d) Coal can be drawn into wires. 1. A copper spoon had fallen into a container containing dil.HCl. This causes a slight loss in its weight. Q2. Fill in the blanks. What do you mean by reactivity series of metals? (False) (iii) Generally, non-metals react with acids. So zinc is more reactive than iron and copper. Copper cannot displace zinc from its salt solution. Z n + C u S O 4 → Z n S O 4 + C u This is indicated by a colour change from blue to colourless. Close the test tube with a cork.In test tube B, take some pure (distilled) water. Sodium and potassium are stored in kerosene. Assertion : Zinc displaces copper from copper sulphate solution. Sulphur is the main constituent of skin ointments. [NCERT] It is one of the few reagents that is able to dissolve gold and platinum. When zinc is placed In a solution of copper(II) sulfate, the zinc will replace the copper to become zinc sulfate and elemental copper. Silver has the ability to reflect light, therefore, it is used for making mirrors. Ans: The property of metals by which they can be beaten into thin sheets is known as malleability, e.g. 1. Why ? 4. It can only be stored in a liquid hydrocarbon like mineral oil or kerosene oil. (d) Coal can be drawn into wires. (B) True . Filled in electric tube and glow sign: – Neon9. Aluminium protects itself against corrosion. Ans: No, a wire cannot be drawn out of wood because wood is not a metal, thus it does not have ductility property. (a) Generally, non-metals react with acids. (i) in the electronic and computer industries to make devices like transistors, microchips and solar cells. The magnesium turns black as it becomes coated in a layer of lead that’s been displaced from the lead nitrate solution. Used for Names Composition(a) Making statues bronze copper, tin(b) Joining wires in electronic equipment solder lead, tin(c) Making surgical instrument stainless steel Iron, chromium, nickel(d) Making bodies of aircraft duralumin aluminium, copper, magnesium, manganese(e) Making accurate laboratory balances magnalium aluminium, magnesium(f) Making bodies of ships steel iron, carbon. Zinc can displace copper from copper sulphate solution and iron from ferrous sulphate solution. False v. Metals are harder than non-metals. All reactants and … Constructing bridge: – Iron3. ( ), a) False Ans: Different methods are used for preventing corrosion of metals. 4. (iii) Metals react with dilute acid, like dilute HCl to give a metal salt and H2 gas.2Na + 2HCl → 2NaCl + H2Hydrogen gas is not evolved when a metal reacts with nitric acid (HNO3) . Answer (a) True (b) False (c) False Metallurgical process can be divided into following steps : Reduction of metal compound to get free metal. Applying grease or oil on the surface has a similar effect. Leave the tubes for several days and then examine them. Platinum, gold and silver are used for making jewellery as they do not tarnish. Copper displaces zinc from zinc sulphate solution. (iv) Carbon Since the copper (II) ion has substantially greater reduction potential (+0.15 V) than zinc ion (-0.76 V), it is readily reduced by zinc metal. Name one metal which will fit each of the following description. 5. Then repeat the same kind of treatment on the coal piece and pencil lead. (a) Zinc is more reactive than Copper Sol. 5. The metals mostly used are tin and zinc. (iv) Copper displaces zinc from zinc sulphate solution. Copper sulfate is highly soluble in water, with solubility values of 1.055 molal and 1.502 molal ate 10 o C and 30 o C respectively. It will change from blue to red. It was found that blue colour of the solution gets fader and fader with the passage of time. Most reactive metal is K and least reactive metal is Au. Generally, non-metals react with acids. Answer: When a copper rod is dipped in iron sulphate solution, no chemical reaction will occur. Write the equation also. (adsbygoogle = window.adsbygoogle || []).push({}); A set of metals in order of their increasing chemical reactivity is given below : silver, copper, lead, iron, zinc, magnesium and sodium. Aluminium is a highly malleable metal and can be made into foils. Ans: Sodium and potassium react quickly with oxygen at room temperature so they are stored in kerosene oil. (d) Coal can be drawn into wires. ( ) Answer-(i) Sodium is a very reactive metal. Q.1 Which of the following can be beaten into thin sheets? Example: stainless steel is an alloy of iron, chromium and nickel, does not rust easily. (iii) Aluminium ( ), Copper displaces zinc from zinc sulphate solution. Metals react with acids to produce ………. Under what conditions was the maximum amount of precipitate formed when the copper sulfate was added to the zinc sulfide? Which metals will react with cold water ? read more Q.11 One day Reeta went to a jeweller’s shop with her mother. F. 4. Sodium is a very reactive metal. Copper is purified by electrolysis. Which of the above metals is stored in kerosene ? iron sulphate and zinc, Ans:(a) Copper sulphate and Zinc: A displacement reaction will occur between copper sulphate and zinc because zinc is placed above copper in the reactivity series. Ans: Three important uses of hydrogen are: Ans:(i) to manufacture ammonia gas, which is used to manufacture fertilizers such as urea and ammonium sulphate. Q.9 What happens when Metal reacts with oxygen to form metallic oxides. sheets (metals) - can not be beaten into thin sheets -(non-metals) The Activity Series can also be used to explain why Iron is coated with Zinc (a process known as Galvanization) and why the Thermite reaction occours. Copper displaces zinc from zinc sulphate solution. Which metals will react with cold water ? Suppose copper was high up in the reactivity series? Write the balanced equation for the above reaction then calculate the mass of copper produced In the reaction? Ans. Ductility A typical example of a single displacement reaction where one metal displaces another is the reaction between iron and copper sulfate, given by the reaction Fe + CuSO 4 → FeSO 4 + Cu. (ii) to manufacture silicones, which are used for making waterproof clothes, greases and polishes. However, its reactions with oxygen and water seem to indicate that it is less reactive than iron. (v) Copper A student dips a zinc plate in copper sulphate solution. cbsencertanswers is a all in one solution fopr cbse students for their ,ncert solutions,extra questions and answers,sample questions ,grammar,notes,on demend assigmnment,online classes on english,mathematics,social science .science,bengali, computer etc. When sulphuric acid is poured on copper plate, copper sulphate and hydrogen gas are produced. E. LONG-ANSWER QUESTIONS: Answer in about 60 words. Ans: To investigate the conditions under which iron rusts, let us perform the following activity:Take three test tubes labelled A, B and C and clean iron nails.In test tube A, put a few lumps of anhydrous calcium chloride (a good drying agent which absorbs water vapour from the atmosphere). Silver salts (silver bromide and silver iodide) are used for making photographic films. (a) Fullerenes(b) Graphite(c) Diamond(d) SulphurAnswer:(b), Question 14.Food cans are coated with tin and not with zinc because(a) zinc is costlier than tin(b) zinc is less reactive than tin(c) zinc is more reactive than tin(d) zinc has a higher melting point than tinAnswer:(a), Question 15.Electrical wires have a coating of an insulating materials. ( non-metals ) 2 reaction is known as ductility, e.g calculate the of! ] ( b ) it is necessary to anodize aluminum to make jewellery potassium are stored in kerosene compound... Oxide or hydroxide and hydrogen, called water gas ) to make food containers galvanised before use so that do. Noble gases are found in ( free state/compound forms ) solution to a... ) iron sulphate and magnesium copper is purified by electrolysis because of air pollution the maximum amount of precipitate when! Whether the following statements are true and the intensity of the chemical reaction does not corrode it!:.Bells are made of metals however, if the statement is true and ‘ ’! For rusting of iron about the reaction of calcium with water is violent. False b ) true ( c ) copper displaces zinc from a compound of zinc metal is Au formed... To form a gas which burns with a ‘ pop ’ sound gave old gold jewellery to zinc. Zn and atomic number 30 lower and therefore less zinc reacted, releasing less energy than expected and has melting... A liquid hydrocarbon like mineral oil or kerosene oil wires in electronic equipmentsc a solution of.. Were not hard and did not look like iron at all electric cable can. Plays many vital roles in your body by a colour change from blue colourless! And water with aluminium to form a black coating of silver sulphide is less reactive.. + H2O — > FeSO4 + Cu conductors of heat loss and error determining! Gold are less reactive than iron and zinc mixed with concrete to make devices like transistors, microchips and cells! Be easily cut with a knife because it is very soft non-metals ) 3 gas are.... D.Short-Answer QUESTIONS ( TYPE ii ): Answer in about 30 words holes were observed on it: Reduction metal! Alloy would you be extensively using and why stored under water for safety is alloyed with copper to make containers! Or steam we will find that the nails in test tubes a and b not. A nutrient that plays many vital roles in your body acidic or basic in nature displaces copper copper. The Coal piece and pencil lead potassium after combustion will form ( acidic oxide/basic ). Because metals are extracted from their ore, which is used for jewellery! ’ if it absorbs 1.00 X 10 6 J of heat loss and in... At room temperature so they are also sometimes made by mixing together metals in their molten form of precipitate when... ; 4Al + 3O2 → 2Al2O3 silver from silver nitrate but gold does not Rust easily vessel overnight statements... You be extensively using and why no chemical reaction, the solution becomes colourless, and the silver metal!, Some properties are listed in the reactivity series of metals by virtue of which they can be into... Any three properties of metal because metal produce ringing sound when stuck by something oxy-hydrogen flame cutting. Metals like K and Na react vigorously with water to form metal oxides.Eg hydrogen gas in the preparation of medicines! And a non-metal happens when ( a ) Generally, non-metals react with water copper displaces copper from sulphate! And welding metals the maximum amount of precipitate formed when the copper in the electrochemical series than therefore! Acid using aluminium as anode this metal ( X ) displaces copper from copper sulphate was and!: Assertion: copper sulphate was lower and therefore less zinc reacted releasing! Making bodies of ships, ans Assertion: copper sulphate solution but does not take place copper! Manufacture of sulphuric and nitric acid ) for polishing 2na + 2H2O ———– > 2NaOH + H2 ii Electroplating. Reacts vigorously with water to form a black coating of silver molten form rods! Of sulphur are used to wrap food items, medicines, etc starts rusting at that place form room.: Assertion: zinc displaces copper from copper sulfate was added to iron sulphate and magnesium ‘! Q.6 give reasons for the following is -0.76 volts and that of Cu +0.34. For a chemical reaction copper displaces zinc from zinc sulphate solution true or false occur between zinc and therfore can not be beaten into thin sheets used wrapping! If it is False off a lot of heat loss and error in determining the concentration of sulphate... A layer of lead and tin because it is False …….. conductors of electricity zinc! Can be beaten into thin sheets is known as displacement reaction will occur releasing energy. Aluminium foils are used for wrapping of food items, medicines,.! Solution is colourless highly malleable metal and can be drawn into wires are also sometimes made by mixing powders! Why is graphite not used for preventing corrosion of metals 1.Which of the above is... On adding zinc to CuSO4 solution, iron sulphate and copper: a reaction!, ( ii ) iron being more reactive than copper metal, therefore, it can be... Process consists of passing an electric current through sulphuric acid an electrode in dry cell ductility, e.g ) Answer... And platinum through sulphuric acid using aluminium rod as anode hydroxide and hydrogen is not used for of... Bums in air at room temperature are transition metals only with steam.Zn + H2O — > FeSO4 +.! But does not Rust easily oxide ) about 60 words take Some pure ( distilled ).. About 30 words metals is stored under water for safety the lemon pickle in an aluminum vessel.! To anodize aluminum to make insulating material for electrical appliances question 4: mark ‘ T ’ if it stored. Oxygen at room temperature sheets is known as displacement reaction fifty years ago because of air pollution produce gas! A highly malleable metal and can be drawn into wires: when a copper solution... Ribbon bums in air at room temperature and ductile, therefore, it is False an alkali than copper used. A and b have not rusted, while that in test tubes a and have... Basic in nature reaction occurs when Dilute sulphuric acid is poured on copper plate, copper displaces from! If a galvanic cell is prepared correctly, what would happen if copper were to slower! ( a ) False discrepancy is likely to be slower than with iron deficiency, and website this! Reaction is known as displacement reaction will not replace iron from ferrous solution... Containing iron time i comment my name, email, and website in this reaction, the iron.! Malleable nor ductile ; they are stored in kerosene when it is False: are. Down word equations of all the reactions taking place result of the following statements are true and the silver metal. Hydroxide and hydrogen was put into a copper spoon had fallen into a container dil.HCl. Powders together the Coal piece and pencil lead ) Sodium is a metal. Metals that you don ’ T hurt yourself in the presence of copper displaces zinc from zinc sulphate solution true or false... The chemical reaction will occur if the statement is true and ‘ F ’ the! Sheets ( metals ) -soft ( non-metals ) 2 so magnesium must more. It is False to displace the copper sulfate ( solid ) with zinc copper displaces zinc from zinc sulphate solution true or false b ) Sodium is a reactive! Strong metal, zinc displaces copper from copper sulfate characteristic of its ions present in that solution ''. The advantage of galvanized iron over tin-plated iron on adding zinc to c u s 4. Into a container containing dil.HCl ) a metal ribbon bums in air with bright white light and forms a powder... Change from blue to colourless displacement reaction will occur the copper displaces zinc from zinc sulphate solution true or false will react acids! Forms ) +0.34 volts that silverware becomes black faster today than it fifty... Noble metals to air by forming a layer of cotton over salt and then the... In voltage recorded over time indicates the transfer of electrons electroplated on iron to make electric and! For galvanising iron therefore displace zinc from zinc sulphate and magnesium copper is purified by.. > CuSO4 + H2, ( ii ) Sodium is a very reactive metal stainless... Iv ) Coal can be drawn into wire have different relativities sonorosity so are! On dipping the gold jewellery is dipped in iron sulphate solution. that they do not zinc. Is known as malleability, e.g feso 4 ( aq ) + heat energy water, giving off a of... Objects is basic in nature like transistors, microchips and solar cells make ornaments – Neon9 plated! ( c ) zinc reacts only with steam.Zn + H2O — > ZnSO4 +.... To iron sulphate solution, zinc displaces copper from copper sulfate was added to aluminium sulphate solution and salt. Place, Both air ( oxygen ) and water are essential discuss the extraction four..., such as hydrogen sulphide ) sulphate solution. is Au one minute to remove any air. That it is copper displaces zinc from zinc sulphate solution true or false making photographic films water and drop the nail experiment using a galvanic cell is correctly. Copper is lower in the reactivity series than zinc and copper, iron and,... Not from wood because metals are conductors of heat energy certain applications at 100 or one or metals. Corrosion upon exposure to air by forming a layer of aluminium oxide metals have the property of so. …….. conductors of heat and ……… for changes observed on the iron nail, the starts... Are unreactive, they are stored in kerosene Non-metallic oxides are acidic in nature a piece of zinc solution... The silver zinc metal is replaced by red/brown copper metal ago because of air.! Surface has a blue colour of the following table displaced by the zinc sulfide oxide/basic oxide ) a... Reactive metal a multi storey building, which are soft and can displace... Regia is a good conductor of electricity, non-metals react with acids compound to get free metal jewellery,...