8. (Hint: Look at the dehydration reaction of copper sulphate) > A more reactive metal will displace (take the place of) a less reactive metal in a metal salt solution. Question 4: Name one metal which when added to blue CuSO4 solution changes it to green colour. Precautions (a) Q displaces P > To arrange the metals in the increasing or decreasing order of their reactivity one of the commonly used experiment is by checking their displacement rate. Conclusion: Al and Zn metals are more reactive than Fe and Cu. (c) Aluminium salt is colourless and not green in colour. 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. In these reactions the metal atoms lose an electron to become a metal ion (being oxidised). Metals like calcium, sodium and magnesium will react with aluminium sulphate solution. (i) Salt solution CuSO4. Copper is less reactive than iron and cannot react with iron sulphate. How would you devise the procedure to show that Mg > Fe > Cu in reactivity series? A more reactive metal displaces (pushes out) a less reactive metal from its compound. Chlorine is toxic . 2. What is displacement reaction? 5. Answer: When you place iron nail in copper sulphate solution, the reddish brown coating formed on the nail is You would observe the deposition of metal on zinc in test tubes 27. > The order of the metals in the reactivity series can be worked out by using these type of reactions. The water is therefore the oxidising agent. Reactivity series The test tubes containing copper sulphate solution and ferrous sulphate solution could be the tubes: 31. Which one of the two metals is more reactive? A piece of granulated zinc was dropped into copper sulphate solution. (b) Zinc salt solutions are not coloured. Hypothesis. Why does the colour of copper sulphate solution change, when an iron nail is dipped in it? (d) R displaces Q. Record your observations. (d) rough and granular. Black residue would be obtained in test tubes: Theory: The reaction rate or rate of reaction for a reactant or product in a particular reaction is intuitively defined as how fast a reaction takes place. (d) Zn and Al are more reactive than Fe and can displace it. (d) Mg is more reactive than Zn. See more ideas about Chemistry education, Chemistry lessons, Science chemistry. (d) colourless. No reaction will take place, as Fe metal is less reactive than Zn. (ii) Arrange Zn, Fe, Cu and Al metals in the decreasing order of reactivity based on the above result. Question 7: 4. > The arrangement of metals in decreasing order of their reactivity is called reactivity series or activity series of metals. After some time, the colour of the solution changed from (a) A (b) B (c) C (d) D. 1. (d) zinc and aluminium. (a) This will show displacement reaction. 3. (a) colourless to blue (d) Mg + ZnSO4. (a) Al + ZnSO4 30. (b) it is shaken In one molecule of copper sulphate, five water molecules are present to form crystal. This is because its protective aluminium oxide layer makes it appear to be less reactive than it really is. (a) all the four solutions changed. Hence, the blue colour of copper sulphate solution becomes colourless. (c) a colourless gas with a smell of burning sulphur is observed. III. (a) I and III (b) II and IV Answer: Take FeSO4 (aq) solution in each test tube. Fe(s) + CuSO4(aq) —> FeSO4(aq) + Cu(s). For any questions pertaining to CBSE Class 10 Science Practicals Reactivity Series Material, feel free to leave queries in the comments section. (d) Al2(SO4)3(aq.) Conclusion: Al, Zn and Fe metals are more reactive than Cu. Al and Zn metals can displace Fe metal from its salt solution but Cu cannot. In this article, we have discussed a step-by-step procedure to perform CBSE Class 10 Science Practicals experiment Reactivity Series. (d) blue to yellow. (d) Iron is most active metal followed by copper and then zinc. 3. Copper metal is less reactive than iron metal, so no displacement reaction will occur between FeSO, Aluminium metal is more reactive than iron metal, so displacement reaction will occur between FeSO. Thus, zinc is more reactive followed by iron and copper. (a) ZnSO4(aq.) The reactivity series is also known as the activity series of metals. > Reaction with ZnSO4 solution: Two beakers A and B contain Iron (II) sulphate solution. (c) heat zinc and copper strips. 16. Observe the changes and record your observations. So4 ) 3 changed and that of FeSO4 did not change and exists freely into. Fe ( s ) does the colour fades and becomes colourless R is removed the! 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