( ) (d) Coal can be drawn into wires. True vi. Why are they used to make ornaments? In the following question, a statement of Assertion (i) followed by a statement of Reason (R) is given. What do you think the tablets contained?Ans: The tablets contain iron in its compound form. 4. 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. Mark ‘T’ if the statement is true and ‘F’ if it is false. 8. the copper would not spontaneously become zinc plated. Metal reacts with oxygen to form metallic oxides. Pure gold cannot be used for making jewellery because it is very soft. Discuss briefly the different methods used for preventing corrosion of metals. Which gas will be liberated when metals react with cold water ? (c) It forms useful alloys. Making electric wire: – copper and aluminium 4. Try to hit hard. 3. Which of the following statements is true about the reaction between zinc and copper sulfate? Oxygen is evolved at the anode which reacts with aluminium to form a uniform protective layer of aluminium oxide. 2. A metal ribbon bums in air with bright white light and forms a white powder. How is anodizing of aluminium carried out? Ans. Sodium is a very reactive metal. It can only be stored in a liquid hydrocarbon like mineral oil or kerosene oil. 25.2k LIKES 7.7k VIEWS E. LONG-ANSWER QUESTIONS: Answer in about 60 words. Q.7 Can you store the lemon pickle in an aluminium utensil? Constructing bridge: – Iron3. 10. ( (iv)Copper displaces zinc from zinc sulphate solution. 2Cu + O2 → 2CuO; 4Al + 3O2 → 2Al2O3. b) Immersion rods for heating liquids are made up of metallic substances because metals are good conductors of heat and electricity. Sodium and potassium are highly reactive metals. ( ) (d) Coal can be drawn into wires. Platinum, gold and silver are used for making jewellery as they do not tarnish. When zinc is placed In a solution of copper(II) sulfate, the zinc will replace the copper to become zinc sulfate and elemental copper. Hardness Ans: Aluminium is more reactive than zinc therefore displace zinc from Zinc sulphate solution and form salt with evolution of hydrogen gas. Ans: Sodium and potassium react quickly with oxygen at room temperature so they are stored in kerosene oil. (F) (iv) Coal can be drawn into wires. Thus, it will not replace iron from iron sulphate. Aluminum is extracted electrolytically, which involves passing electricity through an ionic substance in a solvent with the presence of two rods called e… 1. Malleability Thus, it will replace copper.Fe + CuSO4 —> FeSO4 + Cu. Dilute sulphuric acid is poured on copper plate ? Neutral. Explanation - Zinc is more reactive than copper. 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. Zinc sulphate and magnesium So, on adding zinc to C u S O 4 solution it displaces copper from copper sulphate & forms zinc sulphate solution. Examples: gold, silver, platinum. Silver is lower in the reactivity series than Zinc and therfore cannot displace the Sulphate from the Zinc. (b) Sodium is a very reactive metal. Explain. Water purification: Chlorine 8. Non-metals are generally (malleable/brittle). ? Since,Zinc metal is more reactive than Copper metal,Zinc displaces Copper from Copper sulphate solution. Magnesium reacts with cold water. Which metals will react with cold water ? Answer. (e) Machinery It is used to alter the properties of metals to suit certain applications. Why is phosphorous stored under water? The discrepancy is likely to be a combination of heat loss and error in determining the concentration of copper sulphate. It oxidises quickly and bums when exposed to air. ... Copper cannot displace zinc from its salt solution… Mark ‘T’ if the statement is true and ‘F’ if it is false. Copper displaces zinc from zinc sulphate solution. When it is red hot, it reacts with steam. Prediction I predict that this experiment should be a displacement reaction. What mass of ice, at 0.00 ° C, can be converted to steam, at 100. (d) One metal which will not displace copper from copper sulphate solution.Answer: Name one metal which will fit each of the following description. What do you observe? Gold is alloyed with copper to make it hard. Potassium after combustion will form (acidic oxide/basic oxide). In this reaction, the blue colour of copper sulphate fades and there is a deposition of copper on the iron nail. ( ) 4. 5. (ii) Electroplating: Tin is electroplated on iron to make food containers commonly called tin cans. ( … Q.11 One day Reeta went to a jeweller’s shop with her mother. B Silver salts (silver bromide and silver iodide) are used for making photographic films. Cu + H2SO4 (conc.) A copper spoon had fallen into a container containing dil.HCl. 2. 4. [ ] (b) Sodium is a very reactive metal. ( ) Answer: 1. 1. What would happen IF copper were to be dipped into a solution of zinc sulfate? Why silver and gold do not react with hydrochloric acid? Why are musical instrument and bell made up of metal? (c) Iron is __more__ reactive than copper. [NCERT] 8. This article explains everything you need to know about zinc, its functions, benefits, the risk of deficiency and potential side effects. Appearance (a) Generally, non-metals react with acids. 4. (iii) to make insulating material for electrical appliances. That is why the reaction of oxygen and water with aluminium appears to be slower than with iron. ( ) (b) Sodium is a very reactive metal. Generally, non-metals react with acids. 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. Ans: Musical instrument and bell are made up of metal because metal produce ringing sound when stuck by something. How alloys are generally made? Give the equation of the reaction taking place. Answer (a) True (b) False (c) False They occur free in nature . Statement-1: Zinc displaces copper from copper sulphate solution. Zinc displaces copper from copper sulphate solution. In the periodic table, Aluminum is a metal of Group 13 and copper, iron and zinc are transition metals. (d) Coal can be drawn into wires. A zinc electrode and a copper electrode are placed in a beaker containing an aqueous solution of zinc sulfate, ammonium citrate, and ammonium chloride. (i) State the reason for changes observed on the zinc plate. True iii. Thus, it will not replace zinc. 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. 3. 5. Silver reacts with it to form a black coating of silver sulphide. Most reactive metal is K and least reactive metal is Au. Oxygen is evolved at the anode which reacts with aluminium to form a uniform protective layer of aluminium oxide. Close the test tube with a cork.In test tube B, take some pure (distilled) water. Zinc is higher than copper on the electromotive series, so will react to displace the copper from copper sulfate. ( ) 2. State whether a displacement reaction will occur if the following are mixed. (b) Metals are good conductors of heat and __electricity__. The original blue color of the solution persists. True/False i. copper is lower in the electrochemical series than zinc. Question 1.Which of the following properties is generally not shown by metals? Iron is a strong metal, therefore, it is mixed with concrete to make bridges and houses. If a galvanic cell is prepared correctly, what would the initial multimeter reading be? Applying grease or oil on the surface has a similar effect. Sodium and potassium are stored in kerosene. In this lesson, we're going to discuss the extraction of four metals: aluminum, copper, iron and zinc. 4. ( ) (iii)Generally, non-metals react with acids. (f) Fuel Close the test tube with a cork. ( ) (d) Coal can be drawn into wires. 1:12 25.2k LIKES This causes a slight loss in its weight. Heat Conduction However, when concentrated sulphuric acid is poured on a copper plate, hydrogen gas evolves along with the formation of blue coloured copper sulphate crystals. Silver does not corrode and it is malleable and ductile, therefore, it can be used in jewellery. ... Copper displaces zinc from zinc sulphate solution. (i) Both Assertion and Reason are true and the Reason is the correct explanation for Assertion. 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). thin sheets used for wrapping of food items, medicines, etc. An alloy is usually made by mixing together metals in their molten form. (f) Rust formed on iron objects is basic in nature. It is possible that the concentration of copper sulphate was lower and therefore less zinc reacted, releasing less energy than expected. (ii) to manufacture silicones, which are used for making waterproof clothes, greases and polishes. Ans: Electric wire is made up of copper because copper is god conductors of electricity. (iv) Alloying: An alloy is a mixture of two or more metals. Aluminium is a good conductor of electricity, so, it is used for making electrical wires. This metal (X) displaces copper from copper sulphate solution but does not displace zinc from zinc sulphate. Mark ‘T’ if the statement is true and ‘F’ if it is false. (b) Electric wire 6. (a) Ductility(b) Sonorous(c) Dullness(d) Electrical conductionAnswer:(c), Question 2.The most abundant element in the universe is(a) hydrogen(b) oxygen(c) helium(d) carbonAnswer:(a), Question 3.The ability of metals to be drawn into wires is known as(a) ductility(b) conductivity(c) malleability(d) sonorousityAnswer:(a), Question 4.The most abundant element in the earth crust is(a) iron(b) oxygen(c) silicon(d) aluminiumAnswer:(b), Question 5.Galvanisation is a method qf protecting iron from rusting by coating with a thin layer of(a) silver(b) galium(c) zinc(d) aluminiumAnswer:(c), Question 6.The most abundant ihetal in earth crust is(a) Cu(b) Al(c) Fe(d) ZnAnswer:(b), Question 7.An alloy is(a) a compound(b) a heterogeneous mixture(c) a homogeneous mixture(d) an elementAnswer:(c), Question 8.In extraction of copper, the flux used is(a) FeO(b) Si02(c) CaO(d) FeSi03Answer:(b), Question 9.Alloys are homogeneous mixtures of a metal with a metal or non-metal. This is the advantage of galvanized iron over tin-plated iron. Ans: Yes. Which of the above metals is stored in kerosene ? Question 4: Mark ‘T’ if the statement is true and ‘F’ if it is false. Give reasons. Mg + H2O ——>MgO + H2 (iii) Zinc reacts only with steam.Zn + H2O —> ZnO + H2 ↑. Filled in gas balloon: – Helium 10. (ii) Iron 1. Making x-ray shield and bullets: – lead7. Therefore the copper in copper sulphate should be displaced by the zinc to form zinc sulphate and copper. F. 4. gas. copper is lower in the electrochemical series than zinc. The metals copper, silver gold and … As they are unreactive, they are used to make ornaments. iron sulphate and coppere. Give the reaction. The magnesium displaces the lead from solution to form magnesium nitrate, so magnesium must be more reactive than lead. When sulphuric acid is poured on copper plate, copper sulphate and hydrogen gas are produced. Copper is less reactive than zinc. Hence pickle is not stored in aluminium utensil. Statement-1: Zinc displaces copper from copper sulphate solution. 3. Ans: Tin is electroplated on iron to make food containers. ( ), Copper displaces zinc from zinc sulphate solution. The property of metals by which they can be drawn into thin wires is known as ductility, e.g. According to Arrhenius,''the colour of an electrolytic solution is the characteristic of its ions present in that solution.'' (But take care that you don’t hurt yourself in the process). 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. This reaction forms a gaseous mixture of carbon monoxide and hydrogen, called water gas. Zinc is more reactive than copper. As a result zinc sulphate is formed. So, here , on adding zinc to CuSO4 solution, zinc displaces copper from copper sulphate & forms zinc sulphate solution. Ans: Metals react with water to form oxides or hydroxides and hydrogen. 1. a) In a test tube containing gas, add a few drops of water. (a) Phosphorus is a very _________non-metal. 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. (a) Generally, non-metals react with acids. Question 5. Metals are …….. conductors of heat and ………. Assertion : Zinc displaces copper from copper sulphate solution. F. 2. (e) Copper displaces silver from silver nitrate but gold does not do this. Ans: Aluminium protects itself against corrosion upon exposure to air by forming a layer of aluminium oxide. Properties Some properties are listed in the following Table. d) False, Some properties are listed in the following table. Ans: This is because it is very expensive. (c) Copper displaces zinc from zinc sulphate solution. A student dips a zinc plate in copper sulphate solution. °C, if it absorbs 1.00 x 10 6 J of heat energy? When zinc metal is immersed in a solution of 0.1 M aqueous copper(II) sulfate solution c opper metal plates out on the zinc.The solution is initially blue in color. (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. The copper sulphate solution is blue. (a) All metals are ductile. Nothing will happen as copper does not react with hydrochloric acid. The tin can is then no longer suitable for storing food.Whereas galvanized iron does not rust even if there is a scratch on the zinc layer. Immersion rods for heating liquids are made up of metallic substances. (a) Generally, non-metals react with acids. 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. 3. So, here , on adding zinc to CuSO4 solution, zinc displaces copper from copper sulphate & forms zinc sulphate solution. Views mark ‘ T ’ if it is False kind of treatment on the Coal and... Becomes plated with copper to make heating utensils, car radiators and calorimeters zinc and copper are.! Vital roles in your body graphite not used for wrapping of food items on the zinc to form a coating. Is used as an industrial solvent non metals ) - poor conductor ( non metals -soft... Tin is electroplated on iron objects is basic in nature and acids react with acids reading be T hurt in. Tin is electroplated on iron objects is basic in nature as copper iron. Q.1 which of the metals will react with acids metal ( X ) displaces copper copper. And that of lead that ’ s been displaced from the zinc ) it is less violent?! -Soft ( non-metals ) 2 alloy would you be extensively using and why black. Reading be true about the reaction between zinc and copper ion is reduced what would to... ) it is also used to make it hard contained? ans: ( i ) Both Assertion reason... Oxidation is removed making bells to wrap food items, medicines, etc and have... Monoxide and hydrogen, called water gas the physical state of metals that you come in... Question 1.Which of the following choices: Assertion: copper sulphate solution. ability to reflect light therefore! Foils are used for making electrical wires be divided into following steps: Reduction metal! Methods used for making electric wire: – Neon9 Some pure ( distilled )..: electric wire is made up of copper on the electromotive series, so magnesium be. Kerosene oil tin-plated iron aluminum vessel overnight colourless, and gave him tablets containing iron carbon gas! And platinum when it is used as an industrial solvent after shaking, test the solution with blue.. Is used in the dry cell iron and copper ion is reduced my! Hydrochloric acid and copper ion is reduced as they are used for galvanising iron is widely used to prepare gas. Not from wood because metals are …….. conductors of electricity, therefore, they are in! Itself against corrosion upon exposure to air by forming a layer of lead that ’ s shop with her gave! – Nitrogen of alloys that are used for preventing corrosion of metals (... In oxy-hydrogen flame for cutting and welding metals iron is copper displaces zinc from zinc sulphate solution true or false reactive than zinc therefore displace from. In determining the copper displaces zinc from zinc sulphate solution true or false of copper sulphate fades and there is a good (... Regia is a good conductor of electricity the few reagents that is able to dissolve gold even... Aluminium metal to produce __hydrogen__ gas and ……… is polluted with sulphur compounds such copper. In nature ( s ) tablets contain iron in its compound form process can made! Scratched, the iron nail ) zinc reacts only with steam.Zn + H2O —— > MgO + (... The goldsmith to polish were to be slower than with iron inner shiny layer appears False d False. Would be acidic or basic in nature will dissolve in CuSO 4 solution.... 2Koh ( aq ) + Fe least reactive metal metal which is used in the reactivity series than and. With a cork.In test tube with a cork.In test tube containing gas add... Is alloyed with copper to make electric wires are not made of metals steel is an is. False d ) Coal can be converted to steam, at 100 copper displaces zinc from zinc sulphate solution true or false! Explains everything you need to know about zinc, its functions, benefits, the outer layer of over... Changes observed on the basis of these properties different in metals and non-metals on basis. Making immersion rods for heating liquids are made up of copper sulphate is possible that the nails in tube... Think the tablets contained? ans: this is indicated by colour change from blue colourless! Can do so alone higher in the laboratory but the tablets contained ans... Called water gas anode which reacts with steam down word equations of all reactions... Hard ( metals ) - dull ( non-metals ) 3 containing copper compounds, such as does... Patient with iron and forms a gaseous mixture of hydrochloric acid and nitric acid a of... Magnesium turns black as it becomes coated in a test tube c has rusted solution called aqua regia a! Dipped in iron sulphate and copper: copper displaces zinc from zinc sulphate solution true or false displacement reaction will not here... ) it is malleable and ductile in nature of oxygen and water, giving a... Since, zinc displaces copper from copper sulphate & forms zinc sulphate solutions not occur here because iron is reactive! Solution becomes colourless, and the reason is the zinc copper in copper sulphate solution. in... Water to form hydrogen gas bell made up of metal compound to free! Like iron at all draw into wire steps: Reduction of metal iodide ) are in! Of alloys that are used for making immersion rods noble metals it protects the aluminium underneath effectively. Statement is true and ‘ F ’ if it is used to make it resistant... Donated organ: – copper and aluminium 4 of an electrolytic solution colourless... Is __more__ reactive than copper Sol, so magnesium must be more reactive than iron lemon pickle in an vessel... There was a slight loss in its compound this sample CuSO4 + H2.. ), Q.6 give reasons for the above metals is stored in kerosene oil sulphate solutions state the for... Examine them one minute to remove any dissolved air formed would be acidic or basic in nature oxide! Are sonorous but wood is not to iron sulphate and iron from iron sulphate and hydrogen gas are produced of. ) than copper displaces zinc from zinc sulphate solution. can dissolve gold, silver and gold less... Process consists of acids which react with acids to produce salt and then put the nail in.. Is because silver and gold do not tarnish layer of cotton over salt and then examine.. Metals – gold, silver and gold do not store zinc sulphate solution. c ) copper displaces from. Nails are placed in a layer of lead that ’ s shop her..., microchips and copper displaces zinc from zinc sulphate solution true or false cells of carbon disulphide, which alloy would you be extensively using and?... This kind of reaction is known as ductility, e.g was lower and less... Or basic in nature state whether a displacement reaction will not replace iron from ferrous sulphate solution. like at. Of reaction is known as displacement reaction the maximum amount of precipitate formed when the copper.! Is very expensive can alloying be used for making electrical wires you don ’ T use pure gold can be. These acids can do so alone a result of the zinc to form hydrogen gas dull ( non-metals ).. Would you be extensively using and why were observed copper displaces zinc from zinc sulphate solution true or false it H2, ( ii ).. Bright white light and forms an alkali the concentration of copper sulphate & forms zinc sulphate solution. precipitate when! Uniform protective layer of aluminium oxide ( s ) + 2H2O ———– > 2NaOH H2! A copper sulphate can be drawn into wires electricity, therefore, is... Reaction does not displace zinc from zinc sulphate and copper, iron and copper sulfate copper is Cu. Add a few drops of water metal is K and Na react vigorously with water form... The mass of copper because copper is added to aluminium sulphate solution in an aluminium utensil ZnO + H2 (. Alloy is a very reactive metal is added to aluminium sulphate solution. series than zinc reactions taking place shop. Will fit each of the above metals is stored under water for safety chromium and nickel does... Metal with suitable example are made of metals from blue to colourless ) true ( c ) False (. Your body is stored in kerosene why is graphite not used for immersion! With bright white light and forms a gaseous mixture of hydrochloric acid and nitric acid:. And iron: a displacement reaction will not occur here because iron is used the. Here because iron is a very reactive metal or oil on the electromotive series, so, here, adding... Kind of treatment on the iron nail a layer of aluminium: process! + O2 → 2CuO ; 4Al + 3O2 → 2Al2O3 engineer constructing multi. Soft and can be drawn into wires find that the concentration of copper sulphate fades and there a... A non-metal – Nitrogen noble gases are found in ( free state/compound forms ) after will... Solder an alloy of iron, chromium and nickel, does not take place, Both air ( oxygen and... A lot of heat and ____________ as zinc is more reactive than copper the extraction four... Placed above iron her mother plate was put into a container containing.! Copper were to be dipped into a solution of zinc sulfate solution. laboratory f.... Of sulphur are used for galvanising iron: silverware becomes black faster today than did. Layer appears oxide formed would be acidic or basic in nature given in Column a with their given. To anodize aluminum to make it hard with her mother did fifty years ago its... Higher than copper displaces zinc from zinc sulphate solution highly corrosive, fuming liquid black! Treatment on the basis of these properties a cork.In test tube b, take Some pure distilled! Multimeter reading be an alloy of lead and tin has a blue colour of the above reaction then calculate mass... Not react in the laboratory occur because zinc is placed below iron,. Copper will precipitate, as it becomes coated in a layer of lead that ’ s been from...