The group reagent of group IV cation is- P (1) \( \mathrm{H}_{2} \m...

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The group reagent of group IV cation is-
P
(1) \( \mathrm{H}_{2} \mathrm{~S} \) only
W
(2) \( \mathrm{NaOH} \)
(3) \( \mathrm{H}_{2} \mathrm{~S} \) in the presence of \( \mathrm{NH}_{4} \mathrm{OH} \)
(4) None
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