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Salt \( A+\mathrm{S} \longrightarrow B \stackrel{\mathrm{BaCl}_{2}}{\longrightarrow} \) White ppt.
\( \mathrm{P} \)
\( A \) is paramagnetic in nature and contains about \( 55 \% \mathrm{~K} \). Thus, \( A \) is :
W
(a) \( \mathrm{K}_{2} \mathrm{O} \)
(b) \( \mathrm{K}_{2} \mathrm{O}_{2} \)
(c) \( \mathrm{KO}_{2} \)
(d) \( \mathrm{K}_{2} \mathrm{SO}_{4} \)
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