1.

Explainthe typesofdoubledisplacementreactionswithexamples.

Answer»

Solution :Thereare twomajorclassesof doubledisplacementreactions. Theyare
Precipitationreactions :
(i)Whenaqueoussolutionsoftwocompoundsare MIXED , if theyreacttoforman insolublecompound, if theyreacttoformand insolublecompoundanda solublecompound, then itis calledprecipitainreaction .
(ii )E .gWHentheclearaqueoussolutionsofpotassiumiodideand lead(II )niyrate aremixed , adoubledisplacementreactiontakesplacebetweenthem .
`Pb(NO _(3) )_(2(AQ))+2KI_((aq))to PbI_(2(s)) +2 KNO_(3(aq))`
NeutralizationReactions :
(i )Acidreactswith thebasetoforma saltandwater .
(ii) It iscalledneutralizationreactionas bothacidand baseneutraliseeachother
Acid+ Base `to`Salt+Water
`HCI_((aq))+NaOH_((aq)) toNaCl_((aq)) +H_(2) O_((l))`


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