They recorded their observations in the form of table given below: Which student noted the colour change in all the four test tubes correctly? A student performed the following four experiments: Answer: A piece of granulated zinc was dropped into copper sulphate solution. The colour of the coating obtained on a zinc rod on dipping in aqueous copper sulphate solution will be (c) solution of ZnSO4 and Al2(SO4)3 only changed. Four clean test tubes, marker, a piece of sand paper and test tube stand. (d) Copper is more reactive than Ag. Iron metal reacts with copper sulphate solution to displace copper and form iron sulphate that is green in colour. (d) Fe will displace Cu ions to give green colour solution and Cu metal is brown coated. 19. The metal that will displace two metal ions from the salt solutions will be the most reactive and the one which will not show any colour change in the solutions is the least reactive. 1. 6. Iron filings were added to a solution of copper sulphate. To show that zinc is more reactive than copper, the correct procedure is to Conclusion: Al and Zn metals are more reactive than Fe and Cu. Answer: Answer: Metal A is more reactive than B, because metal A displaces metal B from its salt solution. Arrange the given metals in the reactivity series: Note: When metals react with nitric acid they do not release hydrogen gas (except magnesium and manganese) because nitric acid acts as a strong oxidizing agent. Magnesium, Zinc and Iron) The colour of the solution and that of the metal would respectively be Answer: The arrangement of metals in a vertical column in order of their decreasing reactivity downwards is called the reactivity series of metals. 29. Aluminium is more reactive than Fe hence it displaces Fe from FeS04 and green colour of FeSO4 disappears. (a) light green to blue The students have to then write their investigation up - including their equipment list, method and analysis of results. The arrangement of metals in a vertical column in order of their decreasing reactivity downwards is called the reactivity series of metals. (b) it is shaken The blue colour of the crystals is due to these five water molecules. (d) Ferrous salts are green. 2. FeSO4 solution in each test tube. (b) Zinc is most active metal followed by copper and then iron. A few pieces of iron filings were then added to both the solutions. Questions based on Reporting and Interpretation Skills, 28. The colour of the solution changed from: (ii) Salt solution FeSO4. Practical Based Questions PBQs based on every experiment with their answers, covering Previous Years’ Questions, are provided experiments for complete coverage of concepts Web support By performing the experiments, students will know the concept in a better way as they can now view the changes happening in front of their eyes. Conclusion: Al metal is not displaced by any of the given metals i.e. The resource is set out as teachers' notes followed by the students' page which presents the task to be investigated. 17. Which one of the two metals is more reactive? What is the colour of iron sulphate solution? (a) A (b) B (c) C (d) D. 1. Aim To observe the action of Zn, Fe, Cu and Al metals on the following salt solutions: ZnSO 4 (aq), FeSO 4 (aq), CuSO 4 (aq), Al 2 (SO 4) 3 (aq) To arrange Zn, Fe, Cu and Al metals in the decreasing order of reactivity based on the above results. 16. Hence, Al metal is the most reactive metal among the given metals. Answer: More Resources CBSE Class 10 Lab Manual Practical Skills: Kerala Syllabus 9th Standard Physics Solutions Guide, Kerala Syllabus 9th Standard Biology Solutions Guide, NCERT Class 10 Science Lab Manual – Reactivity Series, NCERT Solutions for Class 7 Maths Chapter 6 The Triangle and its Properties Ex 6.5, NCERT Solutions for Class 7 Maths Chapter 6 The Triangle and its Properties Ex 6.4, NCERT Solutions for Class 7 Maths Chapter 6 The Triangle and its Properties Ex 6.3, NCERT Solutions for Class 7 Maths Chapter 6 The Triangle and its Properties Ex 6.2, NCERT Solutions for Class 7 Maths Chapter 5 Lines and Angles Ex 5.2, NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.4, NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.3, NCERT Solutions for Class 7 Maths Chapter 4 Simple Equations Ex 4.2, NCERT Solutions for Class 7 Maths Chapter 3 Data Handling Ex 3.4, NCERT Solutions for Class 7 Maths Chapter 3 Data Handling Ex 3.3, NCERT Solutions for Class 7 Maths Chapter 3 Data Handling Ex 3.2, NCERT Solutions for Class 7 Maths Chapter 2 Fractions and Decimals Ex 2.7, NCERT Solutions for Class 7 Maths Chapter 2 Fractions and Decimals Ex 2.6, NCERT Solutions for Class 7 Maths Chapter 2 Fractions and Decimals Ex 2.5, NCERT Solutions for Class 7 Maths Chapter 2 Fractions and Decimals Ex 2.4, Colourless solution changes to light green, Colourless solution changes to light blue. 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