The salt used for performing bead test in qualitative inorganic analysis is ? (A) \( \mathrm{K}_...

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The salt used for performing bead test in qualitative inorganic analysis is ?
(A) \( \mathrm{K}_{2} \mathrm{SO}_{4} \cdot \mathrm{Al}_{2}\left(\mathrm{SO}_{4}\right)_{3} \cdot 24 \mathrm{H}_{2} \mathrm{O} \)
(B) \( \mathrm{FeSO}_{4} \cdot\left(\mathrm{NH}_{4}\right)_{2} \mathrm{SO}_{4} \cdot 6 \mathrm{H}_{2} \mathrm{O} \)
\( \mathrm{P} \)
(C) \( \mathrm{Na}\left(\mathrm{NH}_{4}\right) \mathrm{HPO}_{4} \cdot 4 \mathrm{H}_{2} \mathrm{O} \)
(D) \( \mathrm{CaSO}_{4} \cdot 2 \mathrm{H}_{2} \mathrm{O} \)
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