If the original solution is prepared in water and on P addition of ...

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If the original solution is prepared in water and on
P addition of dil. \( \mathrm{HCl} \), a white precipitate appears it

W may be-
(1) \( \mathrm{Ca}^{2+} \)
(2) \( \mathrm{Ba}^{2+} \)
(3) \( \mathrm{Pb}^{2+} \)
(4) \( \mathrm{Ni}^{2+} \)
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