\( \mathrm{P} \) \( \mathrm{Na}_{2} \mathrm{~S}+\mathrm{HCl} \longr...

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\( \mathrm{P} \)
\( \mathrm{Na}_{2} \mathrm{~S}+\mathrm{HCl} \longrightarrow \mathrm{NaCl}+ \) " \( \mathrm{X} \) ". \( \mathrm{X} \) is:
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(1) \( \mathrm{H}_{2} \mathrm{~S} \)
(2) \( \mathrm{H}_{2} \mathrm{SO}_{4} \)
(3) \( \mathrm{H}_{2} \mathrm{SO}_{3} \)
(4) \( \mathrm{H}_{2} \mathrm{~S}_{2} \mathrm{O}_{3} \)
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