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प्रश्न
Identify the cation of the following case:
NaOH solution when added to solution (C) gives white ppt. which insoluble in excess.
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उत्तर
Ca2+ ion :
\[\ce{Ca(NO3)2 + 2NaOH -> \underset{\text{White ppt. sparingly soluble}}{Ca(OH)2 + 2NaNO3}}\]
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