{"id":19619,"date":"2018-01-31T11:14:10","date_gmt":"2018-01-31T11:14:10","guid":{"rendered":"https:\/\/cbselibrary.com\/?p=19619"},"modified":"2020-11-25T17:33:18","modified_gmt":"2020-11-25T12:03:18","slug":"cbse-class-10-science-lab-manual-reactivity-series","status":"publish","type":"post","link":"https:\/\/cbselibrary.com\/cbse-class-10-science-lab-manual-reactivity-series\/","title":{"rendered":"CBSE Class 10 Science Lab Manual – Reactivity Series"},"content":{"rendered":"
Aim<\/strong><\/span> Materials Required<\/strong><\/span> Theory<\/strong><\/span> Metals and their aqueous salt solutions exhibit colours as follows:<\/p>\n Procedure<\/strong><\/span><\/p>\n Observation Table<\/strong><\/span> Result<\/strong><\/span><\/p>\n Precautions<\/strong><\/span><\/p>\n Viva – Voce<\/strong><\/span><\/p>\n Question 1.<\/span><\/strong> Question 2.<\/span><\/strong> Question 3.<\/span><\/strong> Question 4.<\/span><\/strong> Question 5.<\/span><\/strong> Question 6.<\/span><\/strong> Question 7.<\/span><\/strong> Question 8.<\/span><\/strong> Question 9.<\/span><\/strong> Question 10.<\/span><\/strong> Question 11.<\/span><\/strong> Question 12.<\/span><\/strong> Question 13.<\/span><\/strong> Question 14.<\/span><\/strong> Question 15.<\/span><\/strong> Question 16.<\/span><\/strong> Science Lab Manual<\/a>Science Practical Skills<\/a>Science Labs<\/a>Math Labs<\/a>Math Labs with Activity<\/a><\/p>\n","protected":false},"excerpt":{"rendered":" CBSE Class 10 Science Lab Manual – Reactivity Series Aim To observe the action of Zn, Fe, Cu and Al metals on the following salt solutions: ZnSO4 (aq), FeSO4 (aq), CuSO4 (aq), Al2(SO4)3 (aq) To arrange Zn, Fe, Cu and Al metals in the decreasing order of reactivity based on the above results. Materials Required … Read more<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[6805],"tags":[],"yoast_head":"\n
\nTo observe the action of Zn, Fe, Cu and Al metals on the following salt solutions:
\nZnSO4<\/sub> (aq), FeSO4<\/sub> (aq), CuSO4<\/sub> (aq), Al2<\/sub>(SO4<\/sub>)3<\/sub> (aq)
\nTo arrange Zn, Fe, Cu and Al metals in the decreasing order of reactivity based on the above results.<\/p>\n
\nAluminium foil, copper turnings, zinc granules, iron filings, ferrous sulphate solution, copper sulphate solution, zinc sulphate solution, aluminium sulphate solution, test tubes, test tube stand and four beakers of 50 ml.<\/p>\n
\nDifferent metals have different reactivities towards chemical reagents. Some metals are more reactive than others. The metals, which can lose electron more readily to form positive ions are more reactive.
\nAccording to the reactivity series (or activity series) of metals, a more reactive metal displaces a less reactive metal from its aqueous salt solution. These reactions are called displacement reactions.<\/strong>
\nDisplacement reactions can be used to find out the relative reactivities of metals.
\nExample<\/strong> If a piece of zinc metal is dipped in a solution of copper sulphate, zinc will displace copper from copper sulphate. The blue colour of copper sulphate solution will gradually fade and finally colourless solution of zinc sulphate will be obtained.
\n
\nIt means that zinc has displaced copper from copper sulphate solution, i.e. zinc is more reactive than copper.<\/p>\n\n
\n
\n
\n
\nAl > Zn > Fe > Cu<\/li>\n<\/ul>\n\n\n
\n S. No.<\/strong><\/td>\n Name and formula<\/strong><\/td>\n Colour<\/strong><\/td>\n<\/tr>\n \n 1.<\/td>\n Zinc sulphate (ZnS04<\/sub>)<\/td>\n Colourless<\/td>\n<\/tr>\n \n 2.<\/td>\n Ferrous sulphate (FeS04<\/sub>)<\/td>\n Light green<\/td>\n<\/tr>\n \n 3.<\/td>\n Copper sulphate (CuS04<\/sub>)<\/td>\n Blue<\/td>\n<\/tr>\n \n 4.<\/td>\n Aluminium sulphate AI2<\/sub>(S04<\/sub>)3<\/sub><\/td>\n Colourless<\/td>\n<\/tr>\n \n 5.<\/td>\n Aluminium (Al)<\/td>\n White<\/td>\n<\/tr>\n \n 6.<\/td>\n Iron (Fe)<\/td>\n Blackish grey<\/td>\n<\/tr>\n \n 7.<\/td>\n Copper (Cu)<\/td>\n Reddish brown<\/td>\n<\/tr>\n \n 8.<\/td>\n Zinc (Zn)<\/td>\n Silvery white (greyish)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n \n
\n<\/li>\n
\n<\/li>\n
\n
\n
\n<\/p>\n\n
\n
\nAl > Zn > Fe > Cu<\/li>\n<\/ol>\n\n
\nIn the following reaction, A and B are metals and BX is a salt of metal B:
\nA + BX ——> AX + B
\nWhich one of the two metals is more reactive? Give reason. [NCERT]<\/strong>
\nAnswer:<\/strong><\/span>
\nA is more reactive as it displaces B from its salt solution BX.<\/p>\n
\nName any two metals that are more reactive than iron. [NCERT]<\/strong>
\nAnswer:<\/strong><\/span>
\nZinc (Zn) metal and aluminium (Al) metal are more reactive than iron.<\/p>\n
\nWhy did the colour of copper (II) sulphate solution change, when zinc metal was dipped in it? [NCERT]<\/strong>
\nAnswer:<\/strong><\/span>
\nZinc is more reactive than copper, so it displaces Cu from CuSO4 solution and blue colour of CuSO4<\/sub> turns to colourless due to the formation of ZnSO4<\/sub>.<\/p>\n
\nWhat is your observation when copper is added to iron (II) sulphate solution? [NCERT]<\/strong>
\nAnswer:<\/strong><\/span>
\nWhen copper is added to iron (II) sulphate solution, then no reaction takes place because copper is less reactive than iron.<\/p>\n
\nWhich is the most and the least reactive metal in the above experiment? [NCERT]<\/strong>
\nAnswer:<\/strong><\/span>
\nIn the above experiment; aluminium is most reactive and copper is least reactive metal.<\/p>\n
\nWhy can be safely preserve iron (II) sulphate in a copper vessdl whereas the same cannot be safely preserved in zinc vessel? [NCERT]<\/strong>
\nAnswer:<\/strong><\/span>
\nSince, copper is less reactive than iron so, we can safely preserve iron (II) sulphate in a copper vessel. But zinc is more reactive than iron, so we cannot safely preserve iron (II) sulphate in zinc vessel.<\/p>\n
\nWhen an aluminium strip is kept immersed in freshly prepared ferrous sulphate solution taken in a test tube, what change would you observe?
\nAnswer:<\/strong><\/span>
\nThe light green colour of the solution turns colourless due to the displacement reaction.<\/p>\n
\nSolutions of copper sulphate, iron sulphate and zinc sulphate are prepared and marked I, II and III respectively. Few pieces of aluminium are added to each solution. In which test tube would you see a change?
\nAnswer:<\/strong><\/span>
\nIn all the three solutions, changes occur. Aluminium displaces all the other metals from their salt solution.<\/p>\n
\nWhat does the reactivity series of metals indicate?
\nAnswer:<\/strong><\/span>
\nThe reactivity series of metals indicates the reactivities of different metals in decreasing order while going from top to bottom.<\/p>\n
\nCan we store ZnSO4<\/sub> in an aluminium container? Justify your answer.
\nAnswer:<\/strong><\/span>
\nNo, we cannot store ZnSO4<\/sub> in an aluminium container because Al is more reactive than Zn.<\/p>\n
\nA strip of copper was placed in a beaker containing zinc sulphate solution. On observing the strip next day, what was noticed by student?
\nAnswer:<\/strong><\/span>
\nOn observing the strip next day, student may observe that the copper strip remained as it was.<\/p>\n
\nIron filings were added to an aqueous solution of copper sulphate. After sometime of observation it was found that the colour of the solution has changed. What change in colour is observed?
\nAnswer:<\/strong><\/span>
\nThe colour of the solution has changed from blue to yellowish green as the formed iron sulphate imparts pale green colour to the solution.<\/p>\n
\nA thin plate of zinc metal is placed in a beaker containing aqueous ferrous sulphate solution. The zinc plate is taken out after 15 min. What change in colour of the solution is observed?
\nAnswer:<\/strong><\/span>
\nThe solution becomes colourless.<\/p>\n
\nCan we store copper sulphate in an iron container? Give reason for your answer.
\nAnswer:<\/strong><\/span>
\nNo, we cannot store copper sulphate in an iron container because iron is more reactive than copper therefore, it will displace copper from copper sulphate solution.<\/p>\n
\nWhy do copper pieces not react with FeS04 solution in water?
\nAnswer:<\/strong><\/span>
\nCopper metal is lesser active than iron in the activity series.<\/p>\n
\nWhy does blue colour of the CuSO4<\/sub> solution fade away on stirring with an iron rod?
\nAnswer:<\/strong><\/span>
\nIron being more reactive displaces blue coloured Cu2+<\/sup> ions as Cu atoms.<\/p>\n