InterviewSolution
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InterviewSolution
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When Manucame fromschool,he sawhismothertalkingtoaperson who claimedthat hewouldpolish hertarnishedsilver/goldbangleschargingonlyanominalamountof money. Outof curiosity, Manuaskedthepersonconcernedas to how wouldhepolishthebangles ? Themanshowedhimasliveryliquid.Usinghis knowledgeofchemistry,Manuimmediately sawthroughthe trickandaskedhis mothernotthegetthebangles polishedandrequested the mantopleasegoaway.Read thispassage and answerthefollowing questions :(i) Namethe silveryliquidwithwiththe banglesweretobe rubbed.(ii) Why did Manuaskhismothernotto getthebanglespolished ? (iii) Whatbenefitdoes the manderivefromrubbingthesilver /goldbangleswithsilvery liquid ?(iv) Asastudentofchemistry, whatinitiativewouldyou take to savetheinnocentwomenin thestreetsandmohallasfrombeingcheatedbyquacks ? |
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Answer» Solution :(i) Thesilveryliquidismercury. (ii) Whensilver /goldisrubbedwithmercury, itformsas amalgamwhichdissolvesin theliquidmercury.Due toremovalofthetarnishedsurface ofthe silver /GOLD,banglesgive a shininglookbuttheweightof `2Ag +x Hg tounderset ("Silver AMALGAM") (Ag_2 Hg_x), 2 Au +xHg tounderset ("Gold amalgam")(Au_2Hg_x) ` thebanglesdecreasesduetolossof somesilver /golddue toamalgamformation. That iswhyManu ASKED his mothernottogetthebanglespolished. (iii) Themanisbenefited byrecoveringsilver /gold behind. (IV) A SENSEOF awareness shouldbecreated inthe mindsof innocentwomen byshowingskirts, plays,dramas andprogrammeson TV thatpolishingof silver/goldbanglesandotherornamentsshouldbegot done fromreputed jewelleryshopsin thetownand notfromirresponsibleandunauthorisedpersons.Membersof socialorganisationscanalso undertakedoortocontractprogrammestodecouragewomenfrom gettingsuch servicesfromunknownpersons. |
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