Answer: Na Produced by the electrolysis of molten NaCl. 3. A more reactive metal will displace a less reactive metal from a compound. Alloys. Reduction: Heating of oxides of metals to turn them into metal is known as Reduction. KCl is added to reduce the melting point of NaCl. It is also known as activity series. It is easy to extract metal from their oxide, as compared to their sulphides and carbonates. Each element in the reactivity series can be replaced from a compound by any of the elements above it. Both highly electropositive and highly electronegative elements have a strong tendency to react. The metals in the middle of the activity series (Zn, Fe, Pb, etc.) Define activity series of metals. Question 77. Reactivity Trend in the Periodic Table . You know that metals can be separated from molten compounds of metals by electrolysis. They are found in the earth’s crust mainly as oxides, sulphides or carbonates. CBSE Class 10 Science Important Questions Chapter 3 Metals and Non-Metals ... placed below hydrogen in the series, if will not evolve hydrogen 8. The arrangement of metals in the order of decreasing reactivities is called the reactivity series of metals. Mg(s) + Zn 2+ → → Zn(s) + Mg 2+ The interval between metals in the reactivity series of metals represents the reactivity of those metals towards each other. Cinnabar (HgS) is the ore of mercury. Arrange the metals gold, copper, iron and magnesium in order of their increase in reactivity. The way, metals like sodium, magnesium and iron react with air and water is an indication of their relative positions in the ‘reactivity series’. are moderately reactive. Find out how metals like Na, Ca and Mg are extracted. Reactivity series is the series of metals based on their reactivity from highest to lowest. A list of metals arranged in the order of their decreasing reactivity (activity) is called reactivity series. Extraction of Metals Class 10 Question 1. Metals are arranged in the reactivity series on the basis of displacement experiments performed on them. CBSE Class 10 - Ask The Expert. For example, magnesium metal can displace zinc ions in a solution. (i) Extraction of Metals of Least Reactivity: Mercury and copper, which belong to the least reactivity series, are often found in the form of their sulphide ores. asked Oct 10, 2019 in Chemistry by Deepak01 ( … The reactivity series is a series of metal elements, and sometimes carbon and hydrogen, that is arranged according to their reactivity. The organization of elements on the periodic table allows for predictions concerning reactivity. A reactivity series is typically a vertically presented model with the most-reactive element placed at the top of the series and … So, reactivity series of metals can be defined as a series of metals, in order of reactivity from highest to lowest. 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