Physics, asked by sweetykeerthana68329, 10 months ago

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Answered by RISH4BH
100

\Large{\underline{\underline{\pink{\bf{ \purple{\dag}Solution:-}}}}}

{\underline{\green{\tt{1) What\:is\: reactivity\:series? }}}}

➤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:

\boxed{\begin{tabular}{|c|c|} N ame of Atom & Mnemonics \\ \cline{1-2} \\ Potassium & Please \\ \cline{1-2}\\ Sodium & Stop \\ \cline{1-2}\\ Calcium & Calling \\ \cline{1-2}\\ Magnesium & Me \\ \cline{1-2}\\ Aluminium &A \\ \cline{1-2}\\ Zinc&Zebra \\ \cline{1-2}\\ Iron & In \\ \cline{1-2}\\ Lead & Library \\ \cline{1-2}\\ Hydrogen &Hey\\ \cline{1-2}\\ Copper&Call\\ \cline{1-2}\\ Mercury & Me \\ \cline{1-2}\\ Silver & Some \\ \cline{1-2}\\ Gold & Good \end{tabular}}

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{\underline{\green{\tt{2)What\:is\: Chemical\: Displacement\:Reac^n?}}}}

➤ 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 \sf{CuSO_4} .

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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{\underline{\green{\tt{3) What\: are\: the \:colour \:of\: copper\: sulphate\: and \:iron\: sulphate\: crystal?}}}}

➤ 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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{\underline{\green{\tt{4) Mention\:any\:four\:uses\:of\:Metals. }}}}

➤ 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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{\underline{\green{\tt{5) Mention\:any\:four\:uses\:of\:\:Non-metals. }}}}

➤ 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.

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