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It assesses knowledge in subjects relevant to the candidate’s chosen course of study.","tags","utme jamb joint admission matriculation board unified tertiary matriculation examination nigeria africa","version","vip","location",{"_390":391,"_392":393},"type","Point","coordinates",[394,395],9.082,10.3671,"ng","priority",5,"createdOn",1755987353430,"updatedOn","questionsCount",29915,"courseCount",20,"examKey","questionData",{"_369":409,"_410":411,"_412":413,"_278":414,"_415":416,"_263":370,"_417":418,"_419":420,"_110":425},"E5Gn3Gcxe66yckf0tiMTGgT6pjmggE","q","Temporary hard water is formed when rain water containing dissolved carbon(IV) oxide flows over deposits of","ans",[95],"2017","course","chemistry","exp","Permanent hardness in water= Mg & Ca Sulphate.
\nTemporary hardness in water= Mg & Ca Carbonate.
\n
\nTemporary hardness of water is caused by Magnesium and calcium hydrogencarbonate. It is formed when rainwater containing dissolved CO₂ flows over deposit of CaCO₃
\n
\ni.e CaCO₃ + CO₂ + H₂O → Ca(HCO₃)₂","opts",[421,422,423,424],"CaCO₃","Na₂CO₃","Na₂SO₄","CaSO₄",6,"6","initComment","initReply","actionData","errors"]

JAMB - Chemistry (2017 - No. 6)

Explanation

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