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Answers
➤The reactivity series is a list of metals ranked in order of decreasing reactivity, which is usually determined by the ability to displace hydrogen gas from water and acid solutions.
➤The metals placed at higher level can displace the metal placed at lower level from their salt solution.
➤ Less reactive metal cannot specify reactive metal from its salt solutions.
➤ For ex - iron is placed above copd in reactivity series so iron can displace copper from its salt solution.
Here's reactivity series with mnemonics:
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➤ A reaction in which a more reactive metal displaces a less reactive metal from its salt solution is called a displacement reaction.
➤ For ex - Reacⁿ of Fe with .
iron displaces copper from copper sulphate solution and forms ferrous sulphate initially the colour of the solution is blue which changes to green after reaction indicating chemical reaction.
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➤ The colour of copper sulphate crystals in hydrated formis blue.
➤ The colour of ferrous sulphate crystals in hydrated form is green .
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➤ Metals like gold , silver etc. are used in making jewellery.
➤ Copper metal used for manufacturing wires.
➤Metals used in making bridges , constructions , etc.
➤ Metals used in making utensils.
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➤ Chlorine gas is used for disinfection.
➤ Nitrogen is used in packaging of food to prevent rancidity.
➤ Iodine is used as an antiseptic.
➤ We breathe in oxygen necessary for life survival.