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प्रश्न
State the effect of adding a small amount of : (a) sodium hydroxide (b) ammonium hydroxide followed by an excess in case to samples of the salt solutions.
Lead nitrate [ small amount ________ in excess ________ ]
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उत्तर
Lead nitrate :
a. with sodium hydroxide :
- \[\ce{Pb(NO)3 + 2NaOH -> Pb(OH)2 + 2NaNO3}\]
- White curdy ppt. is soluble in excess of NaOH.
b. With ammonium hydroxide :
- \[\ce{Pb(NO)3 + 2NH4OH -> Pb(OH)2 + 2NH4NO3}\]
- White curdy ppt. is insoluble in excess of ammonium hydroxide.
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