(More than one options are correct) \( \mathrm{P} \) To the aqueous...

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(More than one options are correct)
\( \mathrm{P} \)
To the aqueous solution of the salt acidified
W. potassium permanganate is added and its colour is
discharged. It indicates the absence of
(1) \( \mathrm{Fe}^{+2} \)
(2) \( \mathrm{NO}_{3}{ }^{-} \)
(3) \( \mathrm{Be}^{+2} \)
(4) \( \mathrm{Sn}^{+2} \)
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