Try to hit hard. An iron knife kept dipped in blue copper sulphate solution changes to light green because iron replaces copper from copper sulphate and forms iron sulphate. So, here , on adding zinc to CuSO4 solution, zinc displaces copper from copper sulphate & forms zinc sulphate solution. Nowadays, air is polluted with sulphur compounds such as hydrogen sulphide. 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. 1. Copper displaces zinc from zinc sulphate solution. Mark ‘T’ if the statement is true and ‘F’ if it is false. Properties 3. A copper spoon had fallen into a container containing dil.HCl. Question 4: Mark ‘T’ if the statement is true and ‘F’ if it is false. Aqua regia is a highly corrosive, fuming liquid. Ans: Aqua regia, (Latin for ‘royal water’) is a mixture of concentrated hydrochloric acid and concentrated nitric acid in the ratio of 3:1. This happens because iron is more reactive than copper. Zinc is more reactive. 6. Copper displaces zinc from zinc sulphate solution. Copper coils are used in several electrical appliances. 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. -> CuSO4 + H2 What do you mean by reactivity series of metals? (c) Copper cannot displace zinc from its salt solution. 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. What do you mean by malleability and ductility? Ans: Tin is electroplated on iron to make food containers. (d) Coal can be drawn into wires. 10. Graphite is a good conductor of electricity, therefore, it is used as an electrode in dry cell. (b) Sodium is a very reactive metal. ( ), a) False F. 4. (i) Gold 2. If a galvanic cell is prepared correctly, what would the initial multimeter reading be? All metals exist in solid form at room temperature. Ans. (False) (iii) Generally, non-metals react with acids. Sulphur is the main constituent of skin ointments. The magnesium turns black as it becomes coated in a layer of lead that’s been displaced from the lead nitrate solution. (a) Amalgam(b) Brass(c) Bronze(d) SteelAnswer:(d), Question 10.Which of the following is purest form of carbon? Copper displaces zinc from zinc sulphate solution. ... Copper cannot displace zinc from its salt solution… Ductility Iron is a strong metal, therefore, it is mixed with concrete to make bridges and houses. ii) Iron being more reactive displaces copper from copper sulphate. Copper is used in electrical wiring because it is a good conductor of electricity. Name one metal which will fit each of the following description. (a) Generally, non-metals react with acids. (a) Phosphorus is a very __reactive__ non-metal. 4. (b) Metals are conductors of heat and ____________ . (i) Both Assertion and Reason are true and the Reason is the correct explanation for Assertion. False iv. 5. Example: stainless steel is an alloy of iron, chromium and nickel, does not rust easily. . ( ). F. 4. 2Na + 2H2O ———–> 2NaOH + H2, (ii) Magnesium reacts with hot water or steam. sheets (metals) - can not be beaten into thin sheets -(non-metals) ( ) (b) Sodium is a very reactive metal. Microorganisms: Friend and Foe (Chapter 2), Synthetic Fibers and Plastics (Chapter 3), Conservation of Plants and Animals (Chapter 7), Reaching the Age of Adolsence (Chapter 10), Chemical Effects of Electric Current (Chapter 14). 8. Conduction of Electricity, 1. 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. Aluminium foils are used to wrap food items. F. Question 7. Zinc is oxidized, and copper ion is reduced. 65. the copper would not spontaneously become zinc plated. Answer. Examples: gold, silver, platinum. Zinc is a slightly brittle metal at room temperature and has a blue-silvery appearance when oxidation is removed. Mark ‘T’ if the statement is true and ‘F’ if it is false. (d) Jewellery True. gas. (C) Copper displaces zinc from zinc sulphate solution. The metallic oxide formed would be acidic or basic in nature ? Platinum, gold and silver are used for making jewellery as they do not tarnish. It is used as a catalyst in the manufacture of sulphuric and nitric acid. (d) One metal which will not displace copper from copper sulphate solution.Answer: Name one metal which will fit each of the following description. (ii) to extract metals such as copper, lead and tin. (v) Copper Then drop in the nail. Sodium and potassium are stored in kerosene. 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. They are:(a) Painting or applying oil: Painting the surface of the metal after cleaning it thoroughly is the most common method which keeps air away. ( ) (iii)Generally, non-metals react with acids. 5. [ ] (c) Copper displaces zinc from zinc sulphate solution. Making electric wire: – copper and aluminium 4. Boil it for one minute to remove any dissolved air. This reaction takes place in an aqueous solution. A Potassium after combustion will form (acidic oxide/basic oxide). 6. Zinc replaces copper in copper sulphate, because it is more reactive. Because when zinc is dipped into a copper sulfate solution, zinc becomes plated with copper. 9. Metals aremalleable and ductile in nature whereas non-metals are neither malleable nor ductile; they are brittle. (d) Coal can be drawn into wires. Give reason: Chemical reaction does not take place when copper is added to iron sulphate solution. NCERT Solutions Class 10 Science (Physics,Chemistry, Biology). (iv) Carbon T. 3. (vi) Mercury (i) State the reason for changes observed on the zinc plate. Ans: Sodium and potassium react quickly with oxygen at room temperature so they are stored in kerosene oil. Silver is lower in the reactivity series than Zinc and therfore cannot displace the Sulphate from the Zinc. 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. Which of the above metals is stored in kerosene ? In this reaction, the blue colour of copper sulphate fades and there is a deposition of copper on the iron nail. False ii. Mark ‘T’ if the statement is true and ‘F’ if it is false. It was found that blue colour of the solution gets fader and fader with the passage of time. Next day when they brought the jewellery back, they found that there was a slight loss in its weight. Ans: .Bells are made of metals and not from wood because metals are sonorous but wood is not. 5. Your email address will not be published. This causes a slight loss in its weight. (c) Copper displaces zinc from zinc sulphate solution. Her mother gave old gold jewellery to the goldsmith to polish. Now cover the test tube and shake well. Hit hard the aluminium wire also. 6. (d) Coal can be drawn into wires. Constructing bridge: – Iron3. (vi) Mercury Required fields are marked *. (a) Generally, non-metals react with acids. Ans: Graphite is a non metal that is brittle and cannot draw into wire. Zinc pieces will dissolve in CuSO 4 solution and the intensity of the blue colour of CuSO 4 solution decreases. Negative. (F) (ii) Sodium is a very reactive metal. Would it still have been such a useful metal .Give reason? (a) Generally, non-metals react with acids. Ans: Silverware becomes black faster today than it did fifty years ago because of air pollution. 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. Malleability - Can be beaten into thin Question 13.Choose appropriate words from the brackets and complete the statements. on adding zinc to C u S O 4 solution, zinc displaces copper from copper sulphate & forms zinc sulphate solution because zinc is more reactive metal which displaces less reactive metal from its solution. Which metals will react with cold water ? Ans. Mark ‘T’ if the statement is true and ‘F’ if it is false. ( ) (b) Sodium is a very reactive metal. Thus, it will replace copper.Fe + CuSO4 —> FeSO4 + Cu. Ans: phosphorous rapidly burn in air at room temperature so it is stored under water for safety. Which among the following aljoys contain non-metal as one of its constituents? (d) Coal can be drawn into wires. Question 5. (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) . ( ) (c) Copper displaces zinc from zinc sulphate solution. Distinguish between metals and non-metals on the basis of these properties. 7. 1. Which gas will be liberated when metals react with cold water ? Beaker A: Copper sulphate (CuSO4) + Zinc granule (Zn), Beaker B: Copper sulphate (CuSO4) + Iron nail (Fe). Sodium is a very reactive metal. It can dissolve gold, even though neither of these acids can do so alone. How are these properties different in metals and non-metals? Q.9 What happens when Generally, non-metals react with acids. 3 mL CuSO4 + 3 mL Na2S When the number of mL of CuSO4 exceeded the number of mL of Na2S, what happened to the supernatant upon the addition of the test solution and what does that indicate? Metals have the property of sonorosity so they are used for making bells. List different uses of metals that you come across in everyday life. ( … True vi. Water purification: Chlorine 8. 4. We can’t use pure gold to make jewellery. (b) A metal that displaces silver from silver nitrate solution. Zinc displaces copper from copper sulphate solution. 3. Q.2 Which of the following statements is correct? From this we can tell that the order of reactivity (most reactive first) is read more Copper displaces zinc from zinc sulphate solution. ... Copper displaces zinc from zinc sulphate solution. Coal can be drawn into wires. Q3. Answer: (a) False (b) True (c) False (d) False. read more Sodium is a very reactive metal. 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. Making foil for wrapping food: – Aluminium5. Choose the correct option out of the following choices: Assertion: Copper sulphate can be stored in zinc vessel. (b) Immersion rods for heating liquids are made up of metallic substances. 2. 6. Give reasons. 4. ( ) (c) Copper displaces zinc from zinc sulphate solution. (But take care that you don’t hurt yourself in the process). Ans: Aluminium protects itself against corrosion upon exposure to air by forming a layer of aluminium oxide. The property of metals by virtue of which they can be dr (a) Dilute sulphuric acid is poured on a copper plate? What would happen IF copper were to be dipped into a solution of zinc sulfate? They do not losetheir shine easily. Ans: Metals react with water to form oxides or hydroxides and hydrogen. (d) Some non-metals are ductile. 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. Thus, it will replace iron.Zn + FeSO4 —> ZnSO4 + Fe. copper,aluminium. If you are an engineer constructing a multi storey building, which alloy would you be extensively using and why? As they are unreactive, they are used to make ornaments. 3. The heat evolved is not sufficient for the hydrogen to catch fire.Ca(s) + 2H2O(l) → Ca(OH)2(aq) + H2(g)Calcium starts floating because the bubbles of hydrogen gas formed stick to the surface of the metal. (v) Copper In the periodic table, Aluminum is a metal of Group 13 and copper, iron and zinc are transition metals. Appearance Answer: (a) False (b) True (c) False (d) False. 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. Aluminium is a good conductor of electricity, so, it is used for making electrical wires. ( ) 4. 4. 2. Q2. (a) Generally, non-metals react with acids. Thus, it will replace copper.Zn + CuSO4 –> ZnSO4 + Cu, (b) Copper sulphate and Iron: A displacement reaction will occur because iron is placed above copper. (T) (iii) Copper displaces zinc from zinc sulphate solution. (b) Write down word equations of all the reactions taking place in this process. Iron nails are placed in copper sulphate solution ? zinc sulphate and ironf. Copper is purified by electrolysis. Give reason for your answer. Non-metals are generally (malleable/brittle). (e) Copper displaces zinc from a zinc sulfate solution. Metals are …….. conductors of heat and ………. Coal can be drawn into wires. (i) in the electronic and computer industries to make devices like transistors, microchips and solar cells. Ans: (a) It is widely used to make electric wires and cables. Some properties are listed in the following Table. If you mix copper sulfate (solid) with zinc (solid) at room temperature, nothing happens. What happen as a result of the reaction, Answer: Carbon is a non metal. (d) Metals react with acids to produce ____________ gas. Q.11 One day Reeta went to a jeweller’s shop with her mother. (c) Iron is __more__ reactive than copper. (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. 1. Can you suggest a reason for the loss in weight? T. 3. Zinc is a nutrient that plays many vital roles in your body. (e) Copper displaces silver from silver nitrate but gold does not do this. 4. Under what conditions was the maximum amount of precipitate formed when the copper sulfate was added to the zinc sulfide? (iv) Copper displaces zinc from zinc sulphate solution. Zinc is a chemical element with the symbol Zn and atomic number 30. 5. Metals react with acids to produce ………. Could you store 500 ml Zinc sulphate solution in an aluminum vessel overnight? (b) Electric wire ( ) (d) Coal can be drawn into wires. (a) Diamond(b) Graph’ite(c) Fullerenes(d) CharcoalAnswer:(c), Question 11.Which among the following alloys contain mercury as one of its constituents? If a piece of zinc metal is added to aluminium sulphate solution, no reaction takes place. When iron nails are placed in copper sulphate solution, iron sulphate and copper are formed. (b) All non-metals are ductile. Why are electric wire made up of copper? They are also sometimes made by mixing metal powders together. a) In a test tube containing gas, add a few drops of water. B Nothing will happen as copper does not react with hydrochloric acid. It is one of the few reagents that is able to dissolve gold and platinum. 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. On exposure to air, they get oxidized. Which of the above metals is stored in kerosene ? (b) Sodium is a very reactive metal. 3. (Iodine/bromine) has antiseptic properties. (B) True . List three important uses of hydrogen. Which metal is displaced during this reaction? Ans: This is because it is very expensive. Question 71. Oxygen is evolved at the anode which reacts with aluminium to form a uniform protective layer of aluminium oxide. Ans: No, a wire cannot be drawn out of wood because wood is not a metal, thus it does not have ductility property. All reactants and … 2. Answer: Copper is less reactive than zinc. Some properties are listed in the following Table. Immersion rods for heating liquids are made up of metallic substances. This should occur as zinc is higher in the reactivity series than copper. However, its reactions with oxygen and water seem to indicate that it is less reactive than iron. Mark ‘T’ if the statement is true and ‘F’ if it is false. This is indicated by a colour change from blue to colourless. (f) Fuel Q.8 Match the substances given in Column A with their uses given in Column B. So, on adding zinc to C u S O 4 solution it displaces copper from copper sulphate & forms zinc sulphate solution. Zinc is higher than copper on the electromotive series, so will react to displace the copper from copper sulfate. c) Copper cannot displace zinc from its salt solution because Zinc is more reactive than copper. But the tablets were not hard and did not look like iron at all. However, if the tin layer gets scratched, the iron starts rusting at that place. copper sulphate and ironc. (a) Generally, non-metals react with acids. 5. Malleability F. 2. The iron (II) sulphate that was pale green will become colourless when zinc sulphate is formed. 4. Most reactive metal is K and least reactive metal is Au. Write the equation of the chemical reaction taking place. b) Immersion rods for heating liquids are made up of metallic substances because metals are good conductors of heat and electricity. (a) Zinc is more reactive than Copper Sol. It oxidises quickly and bums when exposed to air. a. making statues b. joining wires in electronic equipmentsc. Coal can be drawn into wires. Metal reacts with oxygen to form metallic oxides. The magnesium displaces the lead from solution to form magnesium nitrate, so magnesium must be more reactive than lead. Write the balanced equation for the above reaction then calculate the mass of copper produced In the reaction? So aluminium is more reactive than zinc. a. copper sulphate and zincb. Write word equations of the reactions involved. 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. Filled in gas balloon: – Helium 10. Ans: Aluminium is more reactive than zinc therefore displace zinc from Zinc sulphate solution and form salt with evolution of hydrogen gas. True or False and correct the incorrect statements. Silver reacts with it to form a black coating of silver sulphide. (b) Metals are good conductors of heat and __electricity__. Aluminium is above iron in the reactivity series. (a) No reaction occurs when dilute sulphuric acid is poured on a copper plate. Iron sheets are galvanised before use so that they do not corrode. iron sulphate and coppere. Mark ‘T’ if the statement is true and ‘F’ if it is false. Give an example. Name two metals which are soft and can be easily cut with a knife. (a) Generally, non-metals react with acids. Mark ‘T’ if the statement is true and ‘F’ if it is false. Uses of Copper Sulfate The magnesium displaces the lead from solution to form magnesium nitrate, so magnesium must be more reactive than lead. ? When zinc is placed In a solution of copper(II) sulfate, the zinc will replace the copper to become zinc sulfate and elemental copper. Ans: The property of metals by which they can be beaten into thin sheets is known as malleability, e.g. A zinc plate was put into a solution of copper sulphate kept in a glass container. Q3. If you mix a solution of copper sulfate in water with zinc powder, you will see that the zinc powder will dissolve slowly, and metallic copper will deposit. Record your observations in Table 4.1. ( ) (D) Coal can be drawn into wires. Sodium and potassium are highly reactive metals. Generally Non-metallic oxides are acidic in nature and acids react with bases. Question 14.State whether the following statements are True or False : 1. (a) Generally, non-metals react with acids. Which of the metals will react with oxygen when heated ? Silver is lower in the reactivity series than Zinc and therfore cannot displace the Sulphate from the Zinc. (d) Metals react with acids to produce __hydrogen__ gas. Hence, copper cannot displace zinc from a compound of zinc. Since,Zinc metal is more reactive than Copper metal,Zinc displaces Copper from Copper sulphate solution. Answer: When a copper rod is dipped in iron sulphate solution, no chemical reaction will occur. zinc sulfate solution. ( ) Why is phosphorous stored under water? When it is red hot, it reacts with steam. [ ] (b) Sodium is a very reactive metal. Is the solution acidic or basic? Assertion : Zinc displaces copper from copper sulphate solution. (a) Generally, non-metals react with acids. What mass of ice, at 0.00 ° C, can be converted to steam, at 100. 3. Generally, non-metals react with acids. Distinguish between metals and non-metals on the basis of these properties. Reason: Zinc is less reactive than copper. (c) Copper displaces zinc from zinc sulphate solution. Half-fill test tube C with tap water and drop the nail in it. Of which they can be divided into following steps: Reduction of metal because metal ringing... The blue colour of CuSO 4 solution it displaces copper from copper sulphate forms... Metal of Group 13 and copper: a displacement reaction will not replace iron from ferrous sulphate.. Such as copper, iron and zinc: a displacement reaction will not replace iron from iron sulphate.... 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Aluminium appears to be a combination of heat energy called tin cans zinc ( b ) write down word of! Of reactions between metals and non-metals on the basis of these properties b ) true c! React quickly with oxygen at room temperature and has a similar effect LONG-ANSWER QUESTIONS: in! So they are unreactive, they found that there was a slight copper displaces zinc from zinc sulphate solution true or false in weight! Not from wood advantage of galvanized iron over tin-plated iron applying grease or oil on the Coal and... Not look like iron at all quickly with oxygen when heated Rust.! With copper displaces zinc from zinc sulphate solution true or false knife ) 2 next day when they brought the jewellery,., if it is False likely to be slower than with iron the reagents... Between concentrated sulfuric acid and copper, iron and zinc are in this reaction, a change voltage... C ) one metal which when red hot, it is False appears to be a of! 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