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अवक्षेपण अभिक्रिया से आप क्या समझते है ? उदहारण देकर समझाइये ।

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जब दो विलयनों को मिलाया जाता है ।तो उनकी अभिक्रिया से एक अविलय पदार्थ का निर्माण होता है , जो विलयन में निचे स्थिर हो जाता है । इस अविलय पदार्थ का अवक्षेप पदार्थ को अवक्षेप कहते है तथा इस अभिक्रिया को अवक्षेपण अभिक्रिया कहते है ।
`{: ( Na_(2)SO_(4),+,BaCl_(2)(aq),to,BaSO_(4)(s)darr,+,2NaCl), ("सोडियम सल्फेट ",," बेरियम क्लोराइड ",,"बेरियम सल्फेट",,"सोडियम क्लोराइड "):}`
`Ba^(2+)` तथा `SO_(4)^(2-)` की अभिक्रिया से `BaSO_(4)` के अवक्षेप का निर्माण होता है ।

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